Synonyms of keen

keen 1 of 3

adjective

ˈkēn 

1

as in sensitive

able to sense slight impressions or differences

pilots with especially keen eyesight

Synonyms & Similar Words

• sensitive
• quick
• acute
• sharp
• good
• perceptive
• delicate
• accurate
• fine
• precise
• sensible
• clear
• subtle
• receptive
• discerning
• piercing
• hypersensitive
• supersensitive
• oversensitive
• hyperacute
• hair-trigger

Antonyms & Near Antonyms

• bad
• dull
• dulled
• fading
• dead
• insensitive
• numb
• insensible
• dimmed
• deadened
• inaccurate
• imprecise
• imperceptive

2

as in biting

causing intense discomfort to one's skin

the keen wind gave me chapped lips

Synonyms & Similar Words

• biting
• sharp
• bitter
• shrewd
• brisk
• penetrating
• stinging
• cutting
• piercing
• raw
• smarting
• snappy
• invigorating
• caustic
• prickly
• nippy
• corrosive
• tingling
• needlelike

Antonyms & Near Antonyms

• mild
• gentle
• soothing
• balmy

3

as in sharpened

having an edge thin enough to cut or pierce something

lanced the boil with a keen scalpel

Synonyms & Similar Words

• sharpened
• sharp
• cutting
• edged
• honed
• trenchant
• ground
• whetted
• edgy
• jagged
• stropped
• pointed
• knifelike
• scratching
• piercing
• clawlike
• stabbing
• spiky
• daggerlike
• lacerating
• pointy
• jabbing

Antonyms & Near Antonyms

• blunt
• dull
• smooth
• rounded
• soft
• dulled
• obtuse
• blunted
• even
• level
• flat
• slick

4

as in quick

having or showing quickness of mind

readers who were keen enough to realize that the writer was being satirical

Synonyms & Similar Words

• quick
• intelligent
• clever
• smart
• fast
• brilliant
• sharp
• exceptional
• bright
• wise
• skilled
• educated
• alert
• nimble
• brainy
• quick-witted
• learned
• cunning
• sensible
• sharp-witted
• informed
• astute
• resourceful
• savvy
• supersmart
• trained
• acute
• knowledgeable
• apt
• schooled
• literate
• ultrasmart
• prudent
• discerning
• creative
• perceptive
• knowing
• sagacious
• insightful
• ingenious
• hyperintelligent
• cerebral
• reasonable
• scholarly
• heady
• logical
• judicious
• perspicacious
• erudite
• inventive
• shrewd
• rational
• sound
• sane
• wily
• genial
• percipient
• crafty
• well-read
• highbrow
• sage
• sapient
• foxy

Antonyms & Near Antonyms

• slow
• simple
• dumb
• stupid
• dim
• dull
• soft
• thick
• dense
• obtuse
• fatuous
• opaque
• mindless
• dopey
• senseless
• brainless
• witless
• doltish
• vacuous
• brain-dead
• thickheaded
• unintelligent
• weak-minded
• dunderheaded
• foolish
• pinheaded
• dorky
• boneheaded
• softheaded
• simpleminded
• silly
• feebleminded
• gormless
• idiotic
• ignorant
• unbrilliant
• slow-witted
• dim-witted
• lamebrain
• moronic
• imbecile
• mad
• uninformed
• unsmart
• uneducated
• chuckleheaded
• bubbleheaded
• knuckleheaded
• empty-headed
• half-witted
• airheaded
• thick-witted
• illiterate
• unwise
• lunkheaded
• unthinking
• untaught
• birdbrained
• crazy
• insane
• daft
• absurd
• fool
• nutty
• nonintellectual
• unintellectual
• unacademic
• loony
• wacky
• zany
• lowbrow
• cuckoo
• preposterous
• dippy
• kooky
• balmy
• half-baked
• nonsensical
• daffy
• boobish
• sappy
• harebrained
• dotty
• asinine
• cockeyed
• crackpot
• screwball
• featherheaded
• tomfool

5

as in excellent

of the very best kind

that new digital camera sure is keen

Synonyms & Similar Words

• excellent
• great
• wonderful
• lovely
• terrific
• superb
• fantastic
• awesome
• fabulous
• beautiful
• prime
• stellar
• fine
• marvelous
• hot
• brave
• famous
• neat
• cool
• quality
• good
• classic
• heavenly
• slick
• cracking
• splendid
• immense
• sensational
• choice
• superior
• exceptional
• divine
• first-rate
• first-class
• superlative
• mean
• top-notch
• top
• gone
• too much
• swell
• unsurpassed
• noble
• high-class
• nifty
• fab
• dandy
• sterling
• decent
• groovy
• peachy
• par excellence
• better
• radical
• peachy keen
• frontline
• topping
• grand
• crackerjack
• boss
• prize
• blue-chip
• adequate
• top-shelf
• out of this world
• bully
• tip-top
• banner
• capital
• brag
• blue-ribbon
• righteous
• dope
• first-string
• number one
• topflight
• special
• down
• fantabulous
• dynamite
• bumper
• bonny
• A1
• satisfactory
• wizard
• supernal
• hype
• prizewinning
• corking
• bang-up
• primo
• acceptable
• out-of-sight
• gangbusters
• fancy
• A-OK
• jim-dandy
• all right
• boffo
• five-star
• top-of-the-line
• classical
• phat
• traditional
• four-star
• OK
• numero uno
• gilt-edged
• select
• tolerable
• passable
• premium
• standard
• high-grade
• high-test
• superfine

Antonyms & Near Antonyms

• poor
• terrible
• awful
• pathetic
• lousy
• rotten
• bad
• wretched
• vile
• atrocious
• unsatisfactory
• inferior
• substandard
• execrable
• low-grade
• mediocre
• middling
• second-class
• second-rate

6

as in excited

showing urgent desire or interest

a keen hunger for fame and fortune in the fashion industry

Synonyms & Similar Words

• excited
• eager
• avid
• enthusiastic
• anxious
• ardent
• hungry
• interested
• desirous
• happy
• enthused
• pumped
• impatient
• ready
• willing
• solicitous
• voracious
• thirsty
• greedy
• great
• stoked
• nuts
• agog
• antsy
• gung ho
• raring
• geeked
• crazy
• juiced
• chomping at the bit
• engaged
• bonkers
• champing at the bit
• wild
• hepped up
• hot
• obsessed
• athirst
• hopped-up
• gaga
• glad
• longing
• ambitious
• craving
• covetous
• inclined
• restless
• pining
• amenable
• hankering
• restive
• disposed
• breathless
• appetent
• game
• hung up
• unreluctant

Antonyms & Near Antonyms

• indifferent
• apathetic
• casual
• uninterested
• unconcerned
• unenthusiastic
• disinterested
• nonchalant
• reluctant
• detached
• aloof
• incurious
• insouciant
• unwilling
• hesitant
• stolid
• impassive
• uneager
• loath
• averse
• lukewarm
• languid
• lackadaisical
• disinclined
• halfhearted
• languorous
• spiritless

7

as in intense

extreme in degree, power, or effect

movies gave him keen enjoyment like nothing else

Synonyms & Similar Words

• intense
• intensive
• fierce
• ferocious
• deep
• furious
• terrible
• heavy
• fearful
• profound
• acute
• hard
• violent
• vehement
• vicious
• exquisite
• explosive
• dreadful
• fearsome
• ghastly
• blistering
• frightful
• excruciating
• intensified
• heavy-duty
• concentrated
• heightened
• almighty
• aggravated
• enhanced
• harsh
• stressed
• thorough
• severe
• hellacious
• emphasized
• exhaustive
• magnified
• deepened
• accentuated
• rigorous

Antonyms & Near Antonyms

• moderate
• light
• soft
• weak
• feeble
• shallow
• superficial
• qualified
• eased
• decreased
• moderated
• subdued
• toned (down)
• diminished
• reduced
• lightened
• lessened
• alleviated
• abated

keen

2 of 3

noun

as in wail

a crying out in grief

the loud keens of the widows were heard throughout the war-ravaged city

Synonyms & Similar Words

• wail
• tears
• cry
• groan
• mourning
• lament
• howl
• moan
• lamentation
• weeping
• regret
• suffering
• plaint
• sob
• protest
• outcry
• sorrow
• anguish
• sorrowing
• complaint
• grieving
• grief
• heartbreak
• woe
• hand-wringing
• heartache
• cri de coeur
• agonizing
• dolor

Antonyms & Near Antonyms

• rejoicing
• smiling
• exultation
• laughing
• cheering

keen

3 of 3

verb

1

as in to complain

to express dissatisfaction, pain, or resentment usually tiresomely

victims of the disaster have been keening for weeks about the slowness of governmental aid

Synonyms & Similar Words

• complain
• scream
• worry
• whine
• moan
• kick
• mutter
• grumble
• growl
• bitch
• nag
• inveigh
• squeal
• beef
• bleat
• squawk
• whinge
• cry
• holler
• grouse
• whimper
• kick up a fuss
• murmur
• gripe
• wail
• repine
• carp
• fuss
• crab
• grizzle
• yammer
• kvetch
• protest
• grump
• croak
• bellyache
• maunder
• caterwaul
• grouch
• yowl
• object (to)
• quibble
• quarrel (with)
• cavil
• yawp
• fret
• sob
• lament
• bemoan
• bewail
• deplore
• stew
• blubber

Antonyms & Near Antonyms

• delight
• rejoice
• take
• accept
• tolerate
• bear
• endure
• commend
• applaud
• cheer
• crow
• countenance

2

as in to howl

to make a long loud mournful sound

mourners keening for the victims of the bombing

Synonyms & Similar Words

• howl
• scream
• yell
• shriek
• wail
• bay
• shrill
• ululate
• squeal
• screech
• yowl
• bawl
• squall
• yelp
• caterwaul
• yawp

Synonym Chooser

How does the adjective keen contrast with its synonyms?

The words acute and sharp are common synonyms of keen. While all three words mean "having or showing alert competence and clear understanding," keen suggests quickness, enthusiasm, and a penetrating mind.

a keen observer of the political scene

In what contexts can acute take the place of keen?

The meanings of acute and keen largely overlap; however, acute implies a power to penetrate and may suggest subtlety and sharpness of discrimination.

an acute sense of style

When would sharp be a good substitute for keen?

While the synonyms sharp and keen are close in meaning, sharp implies quick perception, clever resourcefulness, or sometimes questionable trickiness.

sharp enough to spot a confidence game

Example Sentences

Recent Examples of keen

Adjective

There’s also a thread regarding Ruth’s keener understanding of what’s going on, which makes no sense and has no anchoring force. — Angelica Jade Bastién, Vulture, 7 Aug. 2026

Fortunately for those keen to explore some of Alaska’s most compelling corners, there are several small-ship cruise lines that offer trips with no passport required. — Scott Laird, Travel + Leisure, 7 Aug. 2026

Noun

The keen-eyed among our readers will notice that the ROG glasses are largely the same inside and out as the Xreal One Pro, which cost $649. — New Atlas, 19 May 2026

The song finds Abstract continuing to explore the contours of indie and alternative rock, with a simmering lo-fi guitar riff that gives way to the uneasy keen of a synth. — Jon Blistein, Rolling Stone, 25 Oct. 2023

Verb

Of course, Plant also used those keening high notes to express an appetite for destruction. — Owen Gleiberman, Variety, 27 Jan. 2025

He’s been lauded for sounding like a vestige of another age — his supple, keening tenor the result of years of apprenticeship to the Pakistani artists Ustad Saami and Farida Khanum. — Emily Lordi Philip Cheung, New York Times, 10 May 2024

Phrases Containing keen

• peachy keen