1. (adj) silly
a word used for misbehaving children
Antonyms: serious, wise, clear-thinking, dignified, clearheaded
2. (adj) cockamamie, cockamamy, goofy, sappy, silly, wacky, whacky, zany
ludicrous, foolish
Synonyms: slaphappy, crackers, light-headed, ridiculous, round the bend, lightheaded, nutty, punch-drunk, dotty, featherbrained, sappy, kooky, daft, bats, empty-headed, clownish, airheaded, fruity, nuts, bonkers, clownlike, cracked, haywire, wacky, loco, kookie, buggy, zany, silly, goofy, pathetic, dizzy, batty, cockamamy, loony, barmy, cockamamie, buffoonish, around the bend, balmy, giddy, loopy, whacky
Antonyms: clearheaded, clear-thinking, wise, dignified, serious
3. (adj) airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded, silly
lacking seriousness; given to frivolity
Synonyms: woozy, zany, empty-headed, silly, dizzy, wacky, ridiculous, airheaded, whacky, goofy, sappy, cockamamie, light-headed, swooning, giddy, faint, lightheaded, slaphappy, light, featherbrained, punch-drunk, vertiginous, cockamamy, pathetic
Antonyms: clear-thinking, wise, serious, clearheaded, dignified
4. (adj) pathetic, ridiculous, silly
inspiring scornful pity
Synonyms: slaphappy, light-headed, nonsensical, hapless, ludicrous, giddy, poor, farcical, featherbrained, sappy, miserable, lightheaded, absurd, dizzy, laughable, airheaded, ridiculous, wacky, piteous, punch-drunk, cockeyed, misfortunate, pitiable, derisory, zany, silly, preposterous, goofy, pathetic, wretched, empty-headed, pitiful, cockamamy, cockamamie, idiotic, whacky
Antonyms: clearheaded, clear-thinking, wise, dignified, serious
5. (adj) punch-drunk, silly, slaphappy
dazed from or as if from repeated blows
Synonyms: carefree, harum-scarum, pathetic, zany, empty-headed, silly, dizzy, wacky, ridiculous, whacky, goofy, happy-go-lucky, sappy, cockamamie, light-headed, freewheeling, giddy, lightheaded, slaphappy, devil-may-care, featherbrained, punch-drunk, airheaded, cockamamy
Antonyms: clear-thinking, clearheaded, dignified, wise, serious
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Synonyms and Antonyms of silly 
