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

But the weak start, and silly mistakes, against Belgium will linger in the American sporting consciousness. — Sean Gregory, Time, 7 July 2026

Orange cats have a reputation for silly behavior and outlandish antics, but the science doesn't back that up. — Madeline Gunderson, USA Today, 5 July 2026

Noun

But no, sillies: Bradley is white, famous and pretty — no jail time for her! — Kimberly Roots, TVLine, 17 Sep. 2025

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