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foolish - 20 thesaurus results
| Main Entry: | foolish |
| Part of Speech: | adjective |
| Definition: | nonsensical, idiotic |
| Synonyms: | absurd, asinine, brainless, crazy, daffy*, daft, dotty*, fantastic, fatuous, feebleminded*, half-baked*, half-witted*, harebrained*, ill-advised, imprudent, incautious, indiscreet, injudicious, insane, irrational, jerky*, loony*, ludicrous, lunatic, mad, moronic, nutty*, preposterous, ridiculous, senseless, short-sighted, silly, simple, stupid, unintelligent, unreasonable, unwise, wacky*, weak, witless, zany*, cockamamy, dippy, doltish, ill-considered, imbecilic, kooky, nerdy |
| Antonyms: | careful, cautious, circumspect, prudent, sensible, serious, thoughtful, wise, unfoolish |
* = informal/non-formal usage
| Main Entry: | absurd |
| Part of Speech: | adjective |
| Definition: | ridiculous, senseless |
| Synonyms: | batty, crazy, daffy, flaky*, foolish, goofy*, idiotic, illogical, inane, incongruous, irrational, laughable, loony, ludicrous, nonsensical, nutty, off the wall, preposterous, sappy*, screwy*, silly, stupid, unreasonable, wacky, campy, dippy, fooling around, for grins, freaky, gagged up, jokey, joshing, tomfool |
| Antonyms: | certain, logical, rational, reasonable, sensible, wise |
* = informal/non-formal usage
| Main Entry: | asinine |
| Part of Speech: | adjective |
| Definition: | senseless |
| Synonyms: | absurd, daft, foolish, half-witted, idiotic, inane, moronic, silly, sophomoric, stupid, cretinous |
| Main Entry: | babyish |
| Part of Speech: | adjective |
| Definition: | acting like an infant |
| Synonyms: | baby, childish, foolish, immature, infantile, juvenile, kid stuff, puerile, silly, sissy, spoiled, sissyish |
| Antonyms: | grown-up, mature |
| Main Entry: | childish |
| Part of Speech: | adjective |
| Definition: | immature, silly |
| Synonyms: | adolescent, baby, babyish, callow, childlike, foolish, frivolous, green, infantile, innocent, jejune, juvenile, kid stuff*, naive, puerile, unsophisticated, young, youthful, infantine |
| Notes: | childlike refers to a person's temperament, whereas childish refers to a person's behavior |
| Antonyms: | adult, mature, sensible, serious, wise |
* = informal/non-formal usage
| Main Entry: | daffy |
| Part of Speech: | adjective |
| Definition: | silly, crazy |
| Synonyms: | daft, demented, deranged, dotty, foolish, nuts, nutty*, clownish, crackers, goofy loony* |
* = informal/non-formal usage
| Main Entry: | daft |
| Part of Speech: | adjective |
| Definition: | stupid; crazy |
| Synonyms: | absurd, asinine, bedlamite, bonkers, cracked*, crackers, daffy*, demented, deranged, dopey*, flaky*, foolish, fried*, giddy, half-baked*, idiotic, in the ozone, inane, insane, lunatic, mad, mental*, nuts, nutty*, off the wall, out of one's gourd, ridiculous, screwy*, silly, simple, touched, unbalanced, unhinged*, unsound, wacky, whacko, witless |
| Antonyms: | brainy, bright, intelligent, smart, understanding |
* = informal/non-formal usage
| Main Entry: | demented |
| Part of Speech: | adjective |
| Definition: | crazy, insane |
| Synonyms: | bananas, bemused, crackbrained, daft, delirious, deranged, distracted, distraught, flipped out, foolish, frenzied, fruity, hysterical, idiotic, in the ozone, lunatic, mad, maniac, maniacal, manic, non compos mentis, nutty as a fruitcake, out of one's gourd, out of one's tree, psycho, psychopathic, psychotic, schitzy, schizoid, unbalanced, unglued, unhinged*, unsound, whacko |
| Antonyms: | balanced, rational, reasonable, sane, sensible |
* = informal/non-formal usage
| Main Entry: | dopey |
| Part of Speech: | adjective |
| Definition: | stupid |
| Synonyms: | comatose, dense, dumb, foolish, heavy, idiotic, lethargic, senseless, silly, simple, slow, sluggish, thick, torpid, hebetudinous, slumberish |
| Antonyms: | brainy, intelligent, sensible, smart |
| Main Entry: | doting |
| Part of Speech: | adjective |
| Definition: | indulgent; serving |
| Synonyms: | affectionate, devoted, fascinated, fatuous, fond, foolish, lovesick, loving, silly, simple, struck, adoring, lovesome |
| Antonyms: | ignorance, neglect, negligence |
| Main Entry: | dotty |
| Part of Speech: | adjective |
| Definition: | crazy |
| Synonyms: | absurd, daft, demented, disturbed, eccentric, foolish, goofy*, loony*, nuts*, nutty, odd, peculiar, queer, ridiculous, strange, twisted, unconventional, weird, mentally unbalanced |
* = informal/non-formal usage
| Main Entry: | extravagant |
| Part of Speech: | adjective |
| Definition: | indulgent, wasteful |
| Synonyms: | absurd, bizarre, costly, crazy, exaggerated, excessive, exorbitant, expensive, extortionate, extreme, fanciful, fancy, fantastic, flamboyant, flashy, foolish, garish, gaudy, grandiose, immoderate, implausible, improvident, imprudent, inordinate, lavish, ludicrous, nonsensical, ornate, ostentatious, outrageous, preposterous, pretentious, prodigal, profligate, reckless, ridiculous, showy, silly, spendthrift, steep, unbalanced, unconscionable, unreasonable, unrestrained, overpriced |
| Antonyms: | close, economical, moderate, provident, reasonable, saving, stingy, thrifty, unpretentious |
| Main Entry: | fatuous |
| Part of Speech: | adjective |
| Definition: | stupid |
| Synonyms: | absurd, asinine, brainless*, dense, dull, foolish, idiotic, imbecile, inane, insensate, jerky*, ludicrous, lunatic, mad, mindless, moronic, puerile, sappy, silly, simple, vacuous, witless, birdbrained, boneheaded, lamebrained |
| Antonyms: | aware, bright, intelligent, keen, sensible, smart |
* = informal/non-formal usage
| Main Entry: | frivolous |
| Part of Speech: | adjective |
| Definition: | trivial, silly |
| Synonyms: | barmy*, childish, dizzy*, empty-headed*, facetious, featherbrained*, flighty, flip, flippant, foolish, gay, giddy*, harebrained*, idiotic, idle, impractical, juvenile, light, minor, niggling*, paltry, peripheral, petty, playful, pointless, puerile, scatterbrained*, senseless, shallow, sportive, superficial, tongue-in-cheek*, unimportant, volatile, whimsical, ill-considered, light-minded, nonserious, not serious, unprofound |
| Antonyms: | grave, mature, sensible, serious, solemn, thoughtful, wise |
* = informal/non-formal usage
| Main Entry: | goofy |
| Part of Speech: | adjective |
| Definition: | silly |
| Synonyms: | crazy, daffy*, dopey, dotty, empty-headed*, flaky*, foolish, idiotic, nutty*, screwy, stupid, wacky*, weird, dippy, ditzy, kooky |
* = informal/non-formal usage
| Main Entry: | gullible |
| Part of Speech: | adjective |
| Definition: | naive, trusting |
| Synonyms: | believing, biting, credulous, easy mark*, foolish, green*, innocent, mark*, silly, simple, sucker, susceptible, unsophisticated, unsuspecting, being a sucker, easily taken in, falling hook line and sinker, kidding oneself, swallowing whole, taken in, taking the bait, trustful, tumbling for, unskeptical, wide-eyed |
| Antonyms: | astute, discerning, knowledgeable, perceptive, suspicious, unbelieving, wise, untrusting |
* = informal/non-formal usage
| Main Entry: | half-baked |
| Part of Speech: | adjective |
| Definition: | stupid; not thought through |
| Synonyms: | backward, batty*, brainless, crazy, dumb, foolish, harebrained*, idiotic, ignorant, impractical, indiscreet, moronic, retarded, senseless, short-sighted, silly, slow, sophomoric, underdeveloped, unformed, witless, birdbrained, blockheaded, boneheaded, feeble-minded, ill-conceived, imbecilic, poorly planned |
| Antonyms: | intelligent, smart, thoughtful, wise |
* = informal/non-formal usage
| Main Entry: | harebrained |
| Part of Speech: | adjective |
| Definition: | stupid, unthinking |
| Synonyms: | absurd, asinine, barmy, bizarre, careless, changeable, crazy, dizzy*, empty-headed*, featherbrained*, flighty, foolish, frivolous, giddy, half-baked*, heedless, inane, irresponsible, loony*, mindless, preposterous, rash, reckless, scatterbrained*, unstable, unsteady, wacky*, wild, rattlebrained |
| Antonyms: | brainy, intelligent, reasonable, sensible, smart, thoughtful |
* = informal/non-formal usage
| Main Entry: | idiotic |
| Part of Speech: | adjective |
| Definition: | very stupid |
| Synonyms: | asinine, batty*, crazy, daffy*, daft, dull, dumb, fatuous, foolhardy, foolish, harebrained*, imbecile, inane, insane, lunatic, moronic, senseless, silly, unintelligent, birdbrained, imbecilic, squirrelly, thick-witted |
| Antonyms: | brainy, intelligent, smart |
* = informal/non-formal usage
| Main Entry: | ill-advised |
| Part of Speech: | adjective |
| Definition: | unwise, not thought out |
| Synonyms: | brash, confused, foolhardy, foolish, half-baked*, hotheaded*, ill-considered, ill-judged, impolitic, imprudent, inappropriate, incautious, inconsiderate, indiscreet, inexpedient, injudicious, madcap*, misguided, off the top of one's head, overhasty, rash, reckless, short-sighted*, thoughtless, unseemly, wrong |
| Antonyms: | reasonable, sensible, well-advised, wise |
* = informal/non-formal usage
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.

