Synonyms of flat

flat 1 of 3

adjective

ˈflat 

1

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

Synonyms & Similar Words

• exact
• round
• precise
• even

Antonyms & Near Antonyms

• relative
• near
• comparative
• approximate
• imprecise

2

as in boring

causing weariness, restlessness, or lack of interest

a flat portrayal of Benjamin Franklin in the new TV series

Synonyms & Similar Words

• boring
• slow
• tiring
• dull
• stupid
• old
• dusty
• dry
• weary
• heavy
• wearying
• pedestrian
• uninteresting
• annoying
• drab
• tame
• arid
• irritating
• monotonous
• monochromatic
• colorless
• leaden
• stale
• tiresome
• humdrum
• tedious
• stodgy
• dreary
• wearisome
• sterile
• pallid
• ponderous
• stuffy
• blank
• ho-hum
• barren
• numbing
• jejune
• gray
• exhausting
• soggy
• prosaic
• unexciting
• dullish
• mind-numbing
• unimaginative
• drudging
• uneventful
• uninspiring
• draining
• unspectacular
• inanimate
• jading
• blah
• spiritless
• earthbound
• prosy
• undramatic
• aseptic
• pedantic
• unrewarding
• ordinary
• bothersome
• wearing
• common
• irksome
• suspenseless
• unnewsworthy
• unsensational
• poky
• unexceptional
• fatiguing
• vapid
• pleasureless
• tepid
• debilitating
• cumbersome
• commonplace
• discouraging
• lumbering
• dispiriting
• unsurprising
• plodding
• disheartening
• longsome
• demoralizing
• palling
• enervating
• enfeebling

Antonyms & Near Antonyms

• interesting
• involving
• spectacular
• wonderful
• engaging
• intriguing
• gripping
• amazing
• riveting
• absorbing
• astonishing
• surprising
• sensational
• marvelous
• engrossing
• awesome
• wondrous
• fabulous
• exciting
• breathtaking
• astounding
• attractive
• moving
• charming
• inspiring
• amusing
• stimulating
• entertaining
• thrilling
• electrifying
• exhilarating
• animating
• rousing
• touching
• stirring
• energizing
• fascinating
• enchanting
• poignant
• alluring
• attracting
• beguiling
• enthralling
• enlivening
• entrancing
• bewitching
• rip-roaring
• galvanizing
• invigorating
• eye-opening
• diverting
• hair-raising
• provocative
• captivating
• suspenseful
• tantalizing
• spellbinding
• arresting
• mesmerizing

3

as in plane

having a surface without bends, breaks, or irregularities

preferred riding her bike on a flat road

Synonyms & Similar Words

• plane
• smooth
• level
• horizontal
• exact
• even
• uniform
• vertical
• regular
• true
• flush
• straight
• aligned
• tabular
• plumb

Antonyms & Near Antonyms

• coarse
• uneven
• rough
• lumpy
• bumpy
• irregular
• warped
• undulating
• wavy
• inexact
• unsmoothed
• undulatory
• unaligned
• pitted
• pockmarked
• pocky

4

as in stable

having been established and usually not subject to change

charged a flat rate for priority shipping

Synonyms & Similar Words

• stable
• fixed
• unchanging
• certain
• final
• unchangeable
• frozen
• settled
• firm
• hard
• set
• determinate
• steady
• constant
• uniform
• inexpugnable
• hard-and-fast
• solid
• good
• specific
• definite
• reliable
• nonadjustable
• explicit
• safe
• exact
• dependable
• true
• nonnegotiable
• responsible
• stated
• noncancelable
• trustworthy
• stipulated
• given
• unwavering
• sure
• trusty
• tried
• tried-and-true

Antonyms & Near Antonyms

• adjustable
• negotiable
• changeable
• indefinite
• variable
• unspecified
• unstable
• volatile
• fluid
• uncertain
• unpredictable
• open-ended
• fluctuating
• unsettled
• capricious
• mercurial
• mutable
• unsteady
• temperamental
• inconstant
• changeful
• flickery

5

as in simple

having no exceptions or restrictions

a flat denial of the charges

Synonyms & Similar Words

• simple
• complete
• unconditional
• absolute
• sheer
• pure
• total
• utter
• perfect
• very
• outright
• definite
• damned
• damn
• clean
• real
• blank
• huge
• regular
• crashing
• plumb
• deadly
• dead
• categorical
• endless
• stark
• downright
• profound
• stone
• fair
• flat-out
• dreadful
• thorough
• unadulterated
• unmitigated
• straight-out
• thoroughgoing
• unqualified
• blooming
• constant
• out-and-out
• rank
• consummate
• genuine
• unalloyed
• arrant
• bodacious
• horrible
• perpetual
• eternal
• all-out
• authentic
• terrible
• classic
• main
• veritable
• extreme
• unrestricted
• hopeless
• extraordinary
• unremitting
• terrific
• confirmed
• undying
• habitual
• supreme
• superlative
• inveterate
• frightful
• surpassing

Antonyms & Near Antonyms

• uncertain
• restricted
• questionable
• doubtful
• qualified
• dubious
• equivocal

6

as in matte

lacking a surface luster or gloss

used a flat paint for the condo's interior walls

Synonyms & Similar Words

• matte
• dull
• dulled
• lusterless
• gray
• dim
• pale
• dark
• black
• drab
• unpolished
• dingy
• muddy
• lackluster
• tarnished
• darkened
• leaden
• mousy
• cloudy
• dirty
• dusky
• gloomy
• obscured
• obscure
• darkish
• somber
• murky
• palish
• pitch-black
• pitch-dark
• dimmed
• stygian
• tenebrous
• tenebrific

Antonyms & Near Antonyms

• shiny
• glossy
• sleek
• polished
• lustrous
• rubbed
• lacquered
• varnished
• glazed
• burnished
• satin
• silky
• satiny
• slick
• slippery
• silken
• shining
• buffed
• sparkling
• gleaming
• bright
• brilliant
• glistening
• luminous
• shellacked
• shimmering
• dazzling
• radiant
• incandescent
• lucid
• resplendent
• twinkling
• lucent
• glowing
• lambent
• effulgent
• glittering
• scintillating
• gemmy
• glimmering
• glinting
• refulgent
• brightened
• beaming
• candescent
• fulgent
• bedazzling

7

as in bland

lacking in qualities that make for spirit and character

a dull, flat reading of a story that was really quite exciting

Synonyms & Similar Words

• boring
• bland
• dull
• banal
• tiring
• insipid
• watery
• weak
• subdued
• dry
• milk-and-water
• heavy
• lifeless
• uninteresting
• unexciting
• drab
• wishy-washy
• pedestrian
• soft
• uninspiring
• weary
• monotonous
• leaden
• tiresome
• vapid
• namby-pamby
• humdrum
• tedious
• ordinary
• unrewarding
• dreary
• wearying
• mild
• wearisome
• tame
• ponderous
• innocuous
• inoffensive
• inane
• unexceptional
• stale
• commonplace
• jading
• common

Antonyms & Near Antonyms

• spicy
• substantial
• pungent
• poignant
• piquant
• racy
• exciting
• entertaining
• meaty
• inspiring
• thrilling
• galvanizing
• invigorating

8

as in thin

lacking in taste or flavor

this pasta dish tastes a little flat

Synonyms & Similar Words

• bland
• thin
• plain
• tasteless
• insipid
• dead
• weak
• flavorless
• savorless
• unsavory
• watery
• dilute
• unflavored

Antonyms & Near Antonyms

• tasty
• tasteful
• flavorful
• savory
• disgusting
• loathsome
• sickening
• delicious
• distasteful
• unpalatable
• unappetizing
• mawkish
• delectable
• cloying
• flavorsome
• palatable
• appetizing
• seasoned
• spicy
• sapid
• heavy
• rich
• keen
• piquant
• flavored
• toothsome

flat

2 of 3

adverb

as in completely

to a full extent or degree

I am flat broke this week

Synonyms & Similar Words

• completely
• perfectly
• quite
• totally
• fully
• utterly
• fast
• all
• wide
• wholly
• well
• thoroughly
• entirely
• entire
• exactly
• even
• absolutely
• out
• clean
• dead
• enough
• for fair
• full
• soundly
• in whole
• basically
• to pieces
• at length
• down the line
• plain
• all the way
• to bits
• all over
• plumb
• altogether
• heartily
• down to the ground
• cold
• through and through
• to the max
• mostly
• substantially
• to the hilt
• generally
• largely
• all of
• predominantly
• mainly
• downright
• categorically
• principally
• primarily
• predominately
• stone
• unqualifiedly
• chiefly
• stone-cold
• by and large
• generously
• greatly
• more or less
• overall
• hands down
• abundantly
• copiously

Antonyms & Near Antonyms

• partially
• partly
• halfway
• half
• slightly
• just
• barely
• hardly
• marginally
• minimally
• scarcely
• superficially
• somewhat
• incompletely
• part
• approximately
• roughly
• kind of

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

• apartment
• penthouse
• lodgings
• condominium
• tenement
• suite
• digs
• studio
• condo
• duplex
• diggings
• efficiency
• wing
• walk-up
• railroad flat
• saloon
• studio apartment
• garden apartment
• efficiency apartment
• duplex apartment
• floor-through
• flatlet
• bed-sitter
• maisonette
• triplex
• salon
• granny flat
• apartment building
• apartment house
• tenement house
• gallery
• cohousing

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

Example Sentences

Recent Examples of flat

Adjective

After two decades of flat consumption, electricity demand in advanced economies is rising sharply, driven by data centers, electrification and industrial reshoring. —Elena Bou, Forbes.com, 28 May 2026

Kohl's reaffirmed its full-year outlook, expecting net sales and comparable sales to be in a range of down 2% to flat. —Laya Neelakandan, CNBC, 28 May 2026

Adverb

Built from corrugated cardboard with a water-resistant coating, the drone is lightweight, inexpensive, and can be shipped flat-packed for rapid assembly in about five minutes. —Jijo Malayil, Interesting Engineering, 29 Apr. 2026

Spanning more than 4,000 square feet, the flat-roofed, single-story house is designed to frame its countryside setting, with floor-to-ceiling sliding glass doors opening onto terraces and wide rural views. —Abby Montanez, Robb Report, 29 Apr. 2026

Noun

Add an understated top with flats and a modern blazer for the office, or opt for a sleeveless blouse and slingback heels for a perfectly polished finish. —Caley Sturgill, Southern Living, 27 May 2026

Stocks also jumped after the report, with the S&P 500 and Nasdaq entering positive territory and the Dow flat. —Sarah Min,lisa Kailai Han, CNBC, 27 May 2026

Phrases Containing flat

• fall flat