Synonyms of silly in English:


See definition of silly


1‘don't be so silly’


foolish, stupid, unintelligent, idiotic, brainless, mindless, witless, imbecilic, imbecile, doltish

imprudent, thoughtless, rash, reckless, foolhardy, irresponsible

mad, erratic, unstable, scatterbrained, feather-brained

flighty, frivolous, giddy, fatuous, inane, immature, childish, puerile, half-baked, empty-headed, half-witted, slow-witted, weak-minded

informal daft, crazy, dotty, scatty, loopy, screwy, soft, brain-dead, cretinous, thick, thickheaded, birdbrained, pea-brained, pinheaded, dopey, dim, dim-witted, dippy, pie-faced, fat-headed, blockheaded, boneheaded, lamebrained, chuckleheaded, dunderheaded, wooden-headed, muttonheaded, damfool

British informal divvy, dappy

Northern English Scottish informal glaikit

North American informal dumb-ass, chowderheaded

South African informal dof

West Indian informal dotish

dated tomfool


sensible, rational

2‘that was a silly thing to do’


unwise, imprudent, thoughtless, foolish, stupid, idiotic, senseless, mindless, fatuous

rash, reckless, foolhardy, irresponsible, inadvisable, injudicious, ill-considered, misguided, inappropriate, illogical, irrational, unreasonable

hare-brained, absurd, ridiculous, ludicrous, laughable, risible, farcical, preposterous, asinine

informal daft, crazy


sensible, rational

3‘he would brood about silly things’


trivial, trifling, frivolous, footling, petty, niggling, small, slight, minor, insignificant, unimportant, inconsequential, of little account

informal piffling, piddling

North American informal small-bore



4‘he often drank himself silly’


senseless, insensible, unconscious, stupid, dopey, into a stupor, into oblivion, into senselessness, into a daze

numb, dazed, stunned, stupefied, groggy, muzzy


1‘come on, silly’


nincompoop, dunce, simpleton

nitwit, ninny, dimwit, dope, dumbo, dummy, chump, goon, jackass, fathead, bonehead, chucklehead, knucklehead, lamebrain, clod, pea-brain, pudding-head, thickhead, wooden-head, pinhead, airhead, birdbrain, scatterbrain, noodle, donkey

British silly billy, stupe, nit, clot, twit, berk, twerp

Scottish nyaff, sumph, gowk, balloon

North American bozo, boob, schlepper, goofball, goof, goofus, galoot, lummox, dip, simp, spud, coot, palooka, poop, yo-yo, dingleberry

NZ Australian drongo, dill, alec, galah, nong, bogan, poon, boofhead

South African mompara

dated muttonhead, noddy

archaic clodpole, spoony, mooncalf