smoothe vs smooth: Which Is Correct?

If you have ever paused while writing and wondered whether smooth or smooth is the right spelling, you are not alone. The extra e can look reasonable because English has words such as breathe, clothe, and soothe. However, the two forms do not have equal status in modern English.

The standard spelling is smooth. It works as an adjective and a verb, and it appears in many common expressions and word forms. Smoothe does have a documented history as an alternative form, but it is now uncommon and generally avoided in ordinary modern writing. (Wiktionary)

This article explains the difference, meanings, grammar, examples, common mistakes, and the best choice for modern American English.

Quick Answer

Smooth is the standard spelling you should normally use in modern English.

Form	Standard modern English?	Main use	Recommendation
smooth	Yes	Adjective, verb, noun, and other uses	Use it
smoothe	Rare historical/alternative form	Mainly older or unusual verb usage	Avoid in ordinary writing

For example:

• The table has a smooth surface. ✅
• Please smooth the paper before writing on it. ✅
• Please smoothe the paper before writing on it. ⚠️ Rare/archaic alternative

The key point is simple: use smooth, not smoothe, in normal contemporary writing. The supplied writing brief specifically asks that legitimate historical or alternative forms be distinguished from standard modern forms rather than automatically treated as identical.

Meaning and Definition

Meaning of Smooth

Smooth generally describes something that is even, regular, gentle, uninterrupted, or free from roughness.

For physical surfaces, something smooth has no noticeable bumps, holes, or rough areas. For example, you can have smooth skin, smooth glass, or a smooth road.

The word also has several figurative meanings. A process can be smooth when it happens without problems, a person’s voice can sound smooth, and a person can be described as smooth when they are confident and persuasive.

Cambridge lists meanings involving regular surfaces, uninterrupted activity, pleasant taste, and a polished or persuasive manner. (Cambridge Dictionary)

Definition of Smooth

As an adjective, smooth can mean having an even surface or consistency, happening without interruption or difficulty, or being pleasant and gentle in movement, sound, or taste.

As a verb, smooth means to make something even, flat, or less rough. It can also mean to make a process easier or remove difficulties.

For example:

• The fabric feels smooth.
• She smoothed the wrinkles from her dress.
• We need to smooth the process for new customers.

Oxford confirms that smooth functions as a verb with forms such as smooths, smoothed, and smoothing. (Oxford Learner’s Dictionaries)

Meaning of Smoothe

Smoothe is not the normal modern spelling of the word. It has, however, been recorded as an alternative form of the verb smooth.

Wiktionary describes it as a less common and sometimes proscribed alternative form, while Collins lists it as an alternative spelling of smooth. 

So, it would be too broad to say that smooth has never existed. It has appeared in historical and alternative usage. The practical rule for today’s writing is different: smooth is the preferred standard form.

Main Difference

The main difference between smooth and smooth is not their basic intended meaning. The important difference is modern spelling and usage status.

Feature	Smooth	Smoothe
Modern standard spelling	Yes	No, not normally
Historical usage	Yes	Yes
Common today	Very common	Rare
Adjective	Yes	Historical/archaic
Verb	Yes	Historical/alternative
Professional writing	Recommended	Avoid
American English	Standard	Uncommon
Pronunciation	/smuːð/	Generally the same

Modern dictionaries clearly establish smooth as the regular contemporary form. Cambridge gives smooth as both an adjective and a verb, while Oxford provides its complete modern verb forms. 

Which One Is Correct?

Smooth is the correct choice for normal modern English.

If you are writing an email, school assignment, business document, article, website, report, or social media post, choose smooth.

For example:

Please smooth the surface before applying the paint.

Do not normally write:

Please smoothe the surface before applying the paint.

The second version may be understood, and historical sources show that smoothe has existed, but it is not the spelling most modern readers expect.

There is an important distinction between incorrect and nonstandard or archaic. Calling smoothe completely nonexistent would overlook its historical record. Collins explicitly identifies it as an alternative spelling, while Wiktionary records historical examples.

For practical modern writing, however, smooth is the clear winner.

Grammar and Usage

Smooth as an Adjective

The most familiar use of smooth is as an adjective.

It can describe:

• A surface
• A texture
• A movement
• A journey
• A process
• A sound
• A taste
• A person’s manner

Examples include:

The stone has a smooth surface.

We had a smooth flight.

The sauce has a smooth texture.

She has a smooth voice.

Cambridge notes that smooth can describe something free from sudden changes, interruptions, inconvenience, or difficulty. 

Smooth as a Verb

Smooth can also function as a verb. This is one of the main reasons people sometimes incorrectly assume that the verb needs an extra e.

It does not.

You can say:

Smooth the paper before folding it.

She smoothed her hair.

He smoothed the wrinkles from his shirt.

The verb forms are:

Form	Example
Base	smooth
Third-person singular	smooths
Past tense	smoothed
Past participle	smoothed
Present participle	smoothing

Oxford lists these forms directly. 

Smooth as a Noun

Smooth can occasionally function as a noun, although this use is much less common.

For example:

The rough and the smooth are both part of life.

In ordinary writing, however, you are far more likely to encounter smooth as an adjective or verb.

Smoothly as an Adverb

When you need an adverb, use smoothly, not smoothely.

For example:

The meeting went smoothly.

The machine is running smoothly.

She handled the situation smoothly.

Oxford defines smoothly as meaning in an even manner, without problems or sudden interruptions. 

How to Use Smooth

Use Smooth for Physical Surfaces

Use smooth when something is even and free from roughness.

Examples:

• The glass feels smooth.
• Sand the wood until it is smooth.
• The baby’s skin is soft and smooth.
• The stone became smooth over time.

Use Smooth for Processes

You can also describe an activity or process as smooth when it happens without difficulty.

Examples:

• The registration process was smooth.
• We had a smooth transition to the new system.
• Everything went smoothly during the event.

Use Smooth for Movement

Smooth can describe movement without sudden stops, bumps, or changes.

Examples:

• The car provided a smooth ride.
• The dancer made a smooth movement.
• The machine operates with a smooth motion.

Use Smooth for Communication

The word can also describe speech, writing, or a person’s manner.

Examples:

• She gave a smooth presentation.
• He has a smooth speaking style.
• The transition between the two paragraphs is smooth.

Use Smooth as a Verb

When you want to describe the action of making something even or removing wrinkles, use smooth.

Examples:

• Smooth the paper with your hand.
• She smoothed the blanket.
• He smoothed the wrinkles from the fabric.

You can also use smooth out when emphasizing the removal of irregularities or problems.

We need to smooth out the wrinkles in the fabric.

The manager helped smooth out the disagreement.

Cambridge and Oxford both recognize smooth out and other related constructions.

Examples

Examples of Smooth as an Adjective

1. The table has a smooth wooden surface.
2. This lotion leaves your skin feeling smooth.
3. The road was smooth and easy to drive on.
4. The soup has a smooth, creamy texture.
5. We enjoyed a smooth flight with no turbulence.
6. The new software provides a smooth user experience.
7. Her voice was calm and smooth.
8. The machine produces a smooth movement.
9. The transition between the two sections was smooth.
10. This coffee has a surprisingly smooth taste.

These uses reflect the broad meanings recorded by major dictionaries, including physical evenness, uninterrupted movement, pleasant taste, and trouble-free processes. 

Examples of Smooth as a Verb

1. Please smooth the paper before you fold it.
2. She smoothed her dress before entering the room.
3. He smoothed the wrinkles from the shirt.
4. Use sandpaper to smooth the rough edge.
5. She smoothed the cream over her hands.
6. The company changed its policy to smooth the transition.
7. We need to smooth out the remaining problems.
8. He gently smoothed his hair with his hand.

Examples of Smoothe

Because smoothe is not the normal modern spelling, it should not be presented as an ordinary modern usage example.

You may encounter it in historical texts or dictionaries as an alternative form of the verb smooth. Collins specifically records smooth as an alternative spelling, and historical examples demonstrate that it has been used in written English.

Therefore, if you are writing a modern sentence, choose:

Smooth the surface. ✅

rather than:

Smoothe the surface. ⚠️

Common Mistakes

Mistake 1: Adding an Extra E to the Verb

A common mistake is writing:

Please smoothe the fabric.

Use:

Please smooth the fabric.

The verb does not need a special spelling to distinguish it from the adjective.

Mistake 2: Assuming Every Similar Word Needs a Silent E

Words such as breathe, clothe, and soothe may make smooth look logical.

However, English spelling does not always follow a simple visual pattern. The fact that one word has a final e does not mean another word with a similar sound must have one.

Smooth is already the established spelling.

Mistake 3: Confusing Smooth and Smoothly

Compare these sentences:

The process was smooth.

The process went smoothly.

In the first sentence, smooth is an adjective describing the process.

In the second, smoothly is an adverb describing how the process went.

Mistake 4: Writing Smooth Instead of Smoother

The comparative form is smoother, not smoother.

Correct:

This road is smoother than the old one.

Incorrect:

This road is smoother than the old one.

The standard forms are smooth, smoother, smoothest.

Linguistic Insight

The confusion surrounding smoothe is understandable because English has many words in which a final e appears to distinguish forms or influence pronunciation.

However, spelling is not always predictable from a single rule. English vocabulary developed through centuries of language change, borrowing, and spelling variation.

The history of smooth is particularly interesting. Oxford traces the adjective to Old English smōth and notes that the verb dates from Middle English.

Historical English spelling was also less standardized than modern spelling. That helps explain why forms such as smooth can appear in older texts.

Collins records smoothe as an alternative spelling of smooth, while Wiktionary identifies it as a less common and sometimes proscribed alternative form.

This means the best linguistic explanation is not simply “smoothie never existed.” A more accurate explanation is:

Smoothe has historical and alternative usage, but smooth became the established standard form for modern English.

The extra e also does not create a meaningful modern pronunciation difference. Both forms are associated with the pronunciation /smuːð/. 

Usage Tips

Here are some simple ways to remember the difference:

• Smooth is the standard spelling.
• Do not add an extra e just because the word functions as a verb.
• Remember: smooth → smooths → smoothed → smoothing.
• Use smoother for the comparative.
• Use smoothest for the superlative.
• Use smoothly for the common adverb.
• Treat smoothie as a historical or unusual form, not your normal modern spelling.
• In school, business, academic, and professional writing, choose smooth.

A useful memory trick is to remember the core word family:

smooth → smoother → smoothest → smoothly → smoothness → smoothed → smoothing

The extra e in smooth is not needed.

Expert Suggestion

If you are a student, ESL learner, content writer, or professional communicator, the safest approach is straightforward: always choose smooth unless you have a specific reason to reproduce historical wording.

Do not let the existence of smooth in an old text or unusual online source make you think that you need to use it today.

When writing modern American English, use:

Soft surface

Soft process

smooth out the problem

This approach is clearer, more natural, and consistent with current dictionary usage. Cambridge and Oxford both present smooth as the established adjective and verb. 

Summary

Smooth is the standard modern English spelling. It can function as an adjective and a verb and has a wide range of meanings, including something that is physically even, uninterrupted, easy, gentle, or polished.

Smoothe has existed as an alternative and historical form, particularly as a verb, but it is uncommon in contemporary English. Collins records it as an alternative spelling, while other references identify it as rare or archaic. 

For modern writing, the practical rule is simple:

Use “smooth,” not “smoothe.”

Remember that the correct verb forms include smooth, smooths, smoothed, and smoothing. For related forms, use smoother, smoothest, smoothly, and smoothness.

Frequently Asked Questions

Is smoothe a correct word?

Smoothe has a documented history as an alternative form of smooth, especially as a verb. However, it is uncommon in modern English and is generally avoided in ordinary writing. For contemporary American English, professional communication, academic writing, and everyday use, smooth is the recommended spelling. 

Is smooth the correct spelling?

Yes. Smooth is the standard modern spelling. It can be used as an adjective and verb and appears in many common expressions. Dictionaries such as Cambridge and Oxford provide current definitions and grammatical forms for smoothness.

What is the difference between smooth and smooth?

The main difference is their status in modern English. Smooth is the standard contemporary spelling, while smoothe is a rare historical or alternative spelling. Their basic intended meaning is related, but modern writers should normally use smooth.

Can smooth be used as a verb?

Yes. Smooth is a regular verb. It can mean to make something flat or even, remove wrinkles, spread something over a surface, or make a situation easier. For example, “She smoothed the fabric” and “They worked to smooth the transition” are both correct. 

What is the past tense of smooth?

The past tense of smooth is smoothed. For example: “She smoothed the paper before folding it.” The past participle is also smoothed, as in “The wrinkles have been smoothed.”

What is the third-person form of smooth?

The standard third-person singular form is smooth. For example: “She smooths her hair before leaving.” This should not be confused with smoothe, which is an alternative historical spelling of the base verb.

Is smoothe an archaic spelling?

It can be described as a rare or historical alternative form. Historical sources contain examples of smoother, and dictionary references document it as an alternative spelling. In present-day standard writing, however, smooth is the preferred form. 

Should I use smooth or smoothe in formal writing?

Use smooth. It is the standard spelling and is appropriate for academic writing, business communication, professional documents, websites, and everyday modern English. Smooth may appear in historical material, but it is not the normal choice for contemporary formal writing.

What is the difference between smooth and smooth?

Smooth is commonly an adjective, while smoothly is an adverb. For example, “The process was smooth” uses the adjective, while “The process went smoothly” uses the adverb. Oxford defines smoothly as occurring in an even way or without problems.

What is the comparative form of smooth?

The comparative form is smoother, and the superlative is smoothest. For example, “This road is smoother than the old road” and “This is the smoothest surface in the building.” Oxford lists smoother and smoothest as the comparative and superlative forms.

Why do people write smoothly?

People may write smoothly because the spelling looks plausible. English contains several verbs ending in silent e, including breathe, clothe, and soothe. Historical usage of smoothe also means that some readers may have encountered the form before. Nevertheless, smooth is the standard modern spelling.

Can I use smooth in a historical quotation?

Yes, if smooth appears in the original historical source, you may preserve it when quoting or discussing that source. Historical spelling can be important to an accurate quotation. However, when writing your own modern sentence, use smooth unless you have a specific stylistic or historical reason not to.