FLATLY Synonyms: 565 Similar and Opposite Words

Q: How does the adjective 'flat' contrast with its synonyms?

Some common synonyms of flat are even , level , plane , and smooth . While all these words mean "having a surface without bends, curves, or irregularities," flat applies to a surface devoid of noticeable curvatures, prominences, or depressions. // the work surface must be flat

Q: When would 'even' be a good substitute for 'flat'?

In some situations, the words even and flat are roughly equivalent. However, even applies to a surface that is noticeably flat or level or to a line that is observably straight. // trim the hedge so it is even

Q: When is it sensible to use 'level' instead of 'flat'?

The words level and flat can be used in similar contexts, but level applies to a horizontal surface that lies on a line parallel with the horizon. // the vast prairies are nearly level

Q: Where would 'plane' be a reasonable alternative to 'flat'?

While in some cases nearly identical to flat , plane applies to any real or imaginary flat surface in which a straight line between any two points on it lies wholly within that surface. // the plane sides of a crystal

Q: When is 'smooth' a more appropriate choice than 'flat'?

The words smooth and flat are synonyms, but do differ in nuance. Specifically, smooth applies especially to a polished surface free of irregularities. // a smooth skating rink

Q: How does the adjective 'flat' contrast with its synonyms?

Some common synonyms of flat are even , level , plane , and smooth . While all these words mean "having a surface without bends, curves, or irregularities," flat applies to a surface devoid of noticeable curvatures, prominences, or depressions. // the work surface must be flat

Q: When would 'even' be a good substitute for 'flat'?

In some situations, the words even and flat are roughly equivalent. However, even applies to a surface that is noticeably flat or level or to a line that is observably straight. // trim the hedge so it is even

Q: When is it sensible to use 'level' instead of 'flat'?

The words level and flat can be used in similar contexts, but level applies to a horizontal surface that lies on a line parallel with the horizon. // the vast prairies are nearly level

Q: Where would 'plane' be a reasonable alternative to 'flat'?

While in some cases nearly identical to flat , plane applies to any real or imaginary flat surface in which a straight line between any two points on it lies wholly within that surface. // the plane sides of a crystal

Q: When is 'smooth' a more appropriate choice than 'flat'?

The words smooth and flat are synonyms, but do differ in nuance. Specifically, smooth applies especially to a polished surface free of irregularities. // a smooth skating rink

flat 1 of 3

adjective

ˈflat

Definition of flat next

as in exact

being neither more nor less than a certain amount, number, or extent industrial growth has been a flat two percent for each of the last four quarters

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Antonyms & Near Antonyms

as in boring

causing weariness, restlessness, or lack of interest a flat portrayal of Benjamin Franklin in the new TV series

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Antonyms & Near Antonyms

as in plane

having a surface without bends, breaks, or irregularities preferred riding her bike on a flat road

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Antonyms & Near Antonyms

as in stable

having been established and usually not subject to change charged a flat rate for priority shipping

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Antonyms & Near Antonyms

as in simple

having no exceptions or restrictions a flat denial of the charges

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Antonyms & Near Antonyms

as in matte

lacking a surface luster or gloss used a flat paint for the condo's interior walls

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Antonyms & Near Antonyms

as in bland

lacking in qualities that make for spirit and character a dull, flat reading of a story that was really quite exciting

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Antonyms & Near Antonyms

as in thin

lacking in taste or flavor this pasta dish tastes a little flat

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Antonyms & Near Antonyms

flat

2 of 3

adverb

as in completely

to a full extent or degree I am flat broke this week

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Antonyms & Near Antonyms

flat

3 of 3

noun

chiefly British

as in apartment

a room or set of rooms in a private house or a block used as a separate dwelling place had to take on a third roommate in order to afford the bigger flat

Synonyms & Similar Words

Synonym Chooser

How does the adjective flat contrast with its synonyms?

Some common synonyms of flat are even, level, plane, and smooth. While all these words mean "having a surface without bends, curves, or irregularities," flat applies to a surface devoid of noticeable curvatures, prominences, or depressions.

the work surface must be flat

When would even be a good substitute for flat?

In some situations, the words even and flat are roughly equivalent. However, even applies to a surface that is noticeably flat or level or to a line that is observably straight.

trim the hedge so it is even

When is it sensible to use level instead of flat?

The words level and flat can be used in similar contexts, but level applies to a horizontal surface that lies on a line parallel with the horizon.

the vast prairies are nearly level

Where would plane be a reasonable alternative to flat?

While in some cases nearly identical to flat, plane applies to any real or imaginary flat surface in which a straight line between any two points on it lies wholly within that surface.

the plane sides of a crystal

When is smooth a more appropriate choice than flat?

The words smooth and flat are synonyms, but do differ in nuance. Specifically, smooth applies especially to a polished surface free of irregularities.

a smooth skating rink

How does the adjective flat contrast with its synonyms?

the work surface must be flat

When would even be a good substitute for flat?

In some situations, the words even and flat are roughly equivalent. However, even applies to a surface that is noticeably flat or level or to a line that is observably straight.

trim the hedge so it is even

When is it sensible to use level instead of flat?

The words level and flat can be used in similar contexts, but level applies to a horizontal surface that lies on a line parallel with the horizon.

the vast prairies are nearly level

Where would plane be a reasonable alternative to flat?

While in some cases nearly identical to flat, plane applies to any real or imaginary flat surface in which a straight line between any two points on it lies wholly within that surface.

the plane sides of a crystal

When is smooth a more appropriate choice than flat?

The words smooth and flat are synonyms, but do differ in nuance. Specifically, smooth applies especially to a polished surface free of irregularities.

a smooth skating rink

How does the adjective flat contrast with its synonyms?

the work surface must be flat

When would even be a good substitute for flat?

In some situations, the words even and flat are roughly equivalent. However, even applies to a surface that is noticeably flat or level or to a line that is observably straight.

trim the hedge so it is even

When is it sensible to use level instead of flat?

The words level and flat can be used in similar contexts, but level applies to a horizontal surface that lies on a line parallel with the horizon.

the vast prairies are nearly level

Where would plane be a reasonable alternative to flat?

While in some cases nearly identical to flat, plane applies to any real or imaginary flat surface in which a straight line between any two points on it lies wholly within that surface.

the plane sides of a crystal

When is smooth a more appropriate choice than flat?

The words smooth and flat are synonyms, but do differ in nuance. Specifically, smooth applies especially to a polished surface free of irregularities.

a smooth skating rink

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of flat

Adjective

That’s better than the prior year, when apparel sales were roughly flat. —

Melissa Repko, CNBC, 9 Apr. 2026 In championing smaller teams, Dimon is at odds with the ultra-flat management model being adopted by firms like Meta, where CEO Mark Zuckerberg is expecting workers to do more with less in the AI era. —

Claire Zillman, Fortune, 9 Apr. 2026

Adverb

In August 2021, President Joe Biden’s political allies were caught flat-footed. —

Chris Roemer, Baltimore Sun, 12 Mar. 2026 Rasmus Ristolainen was caught flat-footed as Dylan Guenther chipped the puck ahead of the defenseman and sped by him. —

Kevin Kurz, New York Times, 6 Mar. 2026

Noun

Below, on the open flat, a lone cow was feeding. —

Frank Glaser, Outdoor Life, 1 Apr. 2026 Shorts + flats outfit ideas for spring 2026 The combination of shorts + flats equals relaxed, practical outfits with an effortlessly chic touch. —

René Chávez Esparza, Glamour, 31 Mar. 2026 See All Example Sentences for flat

Recent Examples of Synonyms for flat

Adjective

Strict regulations required the new buildings to follow the exact blueprint of the original layout, so bungalows, villas and residences are scattered between lush gardens and the shoreline.

— Condé Nast, Condé Nast Traveler, 5 Apr. 2026
Scientists knew it was triggered by the real world creeping in, but the exact microscopic cause remained out of reach.

— Rupendra Brahambhatt, Interesting Engineering, 5 Apr. 2026

Definition of exact

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“Flat.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/flat. Accessed 11 Apr. 2026.

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Synonyms of flat

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Synonyms of flat

adjective

adverb

noun

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Phrases Containing flat

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