Synonyms of silly

silly 1 of 2

adjective

ˈsi-lē 

1

as in goofy

lacking in seriousness or maturity

the matinee show was filled with a bunch of silly children making noise

Synonyms & Similar Words

• goofy
• giddy
• futile
• playful
• frivolous
• foolish
• puerile
• ditzy
• scatterbrained
• harebrained
• crazy
• happy
• dizzy
• frothy
• yeasty
• scatty
• flighty
• inane
• light-minded
• featherbrained
• nonsensical
• thoughtless
• shallow
• fatuous
• superficial
• daft
• birdbrained
• light-headed
• witless
• flippant
• daffy
• exuberant
• lighthearted
• giggly
• fluttery
• sappy
• light
• fruity

Antonyms & Near Antonyms

• serious
• earnest
• sober
• thoughtful
• somber
• melancholy
• grave
• serious-minded
• unfrivolous
• heavy
• severe
• solemn
• dignified
• staid
• sedate
• no-nonsense

2

as in stupid

showing or marked by a lack of good sense or judgment

those silly movie producers who thought that audiences would fall for that gimmick all over again

Synonyms & Similar Words

• stupid
• foolish
• absurd
• insane
• crazy
• mad
• idiotic
• irrational
• ridiculous
• dumb
• fool
• simple
• nonsensical
• lunatic
• zany
• daft
• wacky
• unreasonable
• asinine
• fatuous
• loony
• preposterous
• kooky
• unwise
• nutty
• dippy
• daffy
• sappy
• weak
• witless
• simpleminded
• senseless
• inept
• wacko
• brainless
• cuckoo
• harebrained
• screwball
• dotty
• slow
• out to lunch
• jerky
• unreasoning
• weak-minded
• crackbrained
• crackpot
• gaga
• barmy
• loony tunes
• moronic
• batty
• half-baked
• balmy
• cockeyed
• tomfool
• illogical
• thoughtless
• bubbleheaded
• lunkheaded
• dopey
• half-witted
• ludicrous
• unreasoned
• dull
• meshuga
• clueless
• fruity
• vacuous
• dorky
• featherheaded
• obtuse
• imbecile
• unintelligent
• laughable
• doltish
• mindless
• farcical
• fallacious
• lamebrain
• thickheaded
• dense
• brain-dead
• invalid
• feebleminded
• oafish
• empty-headed
• dunderheaded
• opaque
• pinheaded
• dim
• gormless
• soft
• softheaded
• unsound
• clownish
• surd
• thick
• dim-witted
• nonrational
• airheaded
• knuckleheaded
• chuckleheaded
• buffoonish
• notional
• slow-witted
• ill-advised
• boobish
• birdbrained
• unconsidered
• chowderheaded

Antonyms & Near Antonyms

• wise
• sound
• sensible
• prudent
• sane
• clever
• reasonable
• intelligent
• judicious
• smart
• bright
• logical
• valid
• rational
• sagacious
• sage
• sapient
• brainy
• well-advised

3

as in ridiculous

so foolish or pointless as to be worthy of scornful laughter

had the silly notion that her latest marriage might last longer than her three previous ones

Synonyms & Similar Words

• ridiculous
• absurd
• pathetic
• stupid
• foolish
• comical
• unreasonable
• dumb
• ludicrous
• laughable
• farcical
• irrational
• derisive
• preposterous
• incredible
• crazy
• risible
• insane
• idiotic
• derisory
• mad
• fantastic
• for the birds
• inane
• nonsensical
• moronic
• cockamamy
• asinine
• fatuous
• unwise
• imbecile
• wacky
• loony
• unreal
• witless
• simpleminded
• unrealistic
• kooky
• illogical
• unbelievable
• brainless
• nutty
• daffy
• harebrained
• inconceivable
• jerky
• daft
• cuckoo
• senseless
• half-baked
• weak-minded
• far-fetched
• screwball
• dotty
• half-witted
• balmy
• cockeyed

Antonyms & Near Antonyms

• serious
• earnest
• solemn
• reasonable
• logical
• realistic
• rational
• sensible
• conceivable
• credible
• believable

4

as in bewildered

suffering from mental confusion

stunning news that knocked me silly

Synonyms & Similar Words

• bewildered
• confused
• dazed
• distracted
• stunned
• dizzy
• out of it
• dopey
• bemused
• muddleheaded
• at sea
• befuddled
• mixed-up
• spacey
• punchy
• slaphappy
• pixilated
• fogged
• punch-drunk
• stupefied
• confounded
• bedeviled
• raddled
• addled
• muzzy
• shell-shocked
• befogged
• unconscious
• addle
• zonked-out
• bushed
• zonked
• addlepated
• senseless
• spaced-out

Antonyms & Near Antonyms

• conscious
• alert
• clearheaded

silly

2 of 2

noun

as in simpleton

Related Words

• simpleton
• goose
• fool
• scatterbrain
• ditz
• flibbertigibbet
• cuckoo
• rattlebrain
• nitwit
• featherhead
• featherbrain
• birdbrain
• softhead

Synonym Chooser

How is the word silly different from other adjectives like it?

Some common synonyms of silly are asinine, fatuous, foolish, and simple. While all these words mean "actually or apparently deficient in intelligence," silly suggests failure to act as a rational being especially by ridiculous behavior.

the silly antics of revelers

In what contexts can asinine take the place of silly?

In some situations, the words asinine and silly are roughly equivalent. However, asinine suggests utter and contemptible failure to use normal rationality or perception.

an asinine plot

When is it sensible to use fatuous instead of silly?

Although the words fatuous and silly have much in common, fatuous implies foolishness, inanity, and disregard of reality.

fatuous conspiracy theories

When could foolish be used to replace silly?

The words foolish and silly can be used in similar contexts, but foolish implies the character of being or seeming unable to use judgment, discretion, or good sense.

foolish stunts

When would simple be a good substitute for silly?

The words simple and silly are synonyms, but do differ in nuance. Specifically, simple implies a degree of intelligence inadequate to cope with anything complex or involving mental effort.

considered people simple who had trouble with computers

Example Sentences

Recent Examples of silly

Adjective

They were called for two personal fouls, a silly unsportsmanlike conduct when kick coverage player Zion Elee was caught shoving after the whistle on a touchback and roughing the passer. — ABC News, 3 Oct. 2026

The two of them together, just 17 months apart, shared playlists, bickered over where to stop during Apple CarPlay calls, pulled up beside me and faded away with silly faces, encapsulating 20 years of my life in my rearview mirror. — Robert Duffer, AJC.com, 2 Oct. 2026

Noun

The glamorous Emmy winner known for Loewe red-carpet looks and starring on prestige dramedy The Bear is returning to full-bore silly in order to play America’s favorite beagle. — Jason P. Frank, Vulture, 6 Aug. 2026

It was shot in portrait because it was shot in Instagram by and for a woman who was losing her mind in quarantine and had fully let the sillies take the wheel. — Ego Nwodim, TIME, 12 Feb. 2025

Phrases Containing silly

• knock silly