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sudden - 20 thesaurus results
| Main Entry: | sudden |
| Part of Speech: | adjective |
| Definition: | unexpected; happening quickly |
| Synonyms: | abrupt, accelerated, acute, expeditious, fast, flash, fleet, hasty, headlong, hurried, immediate, impetuous, impromptu, impulsive, out of the blue*, precipitate, precipitous, quick, rapid, rash, rushing, spasmodic, swift, unforeseen, unusual, precipitant, quickened, speeded, subito |
| Antonyms: | expected, slow |
* = informal/non-formal usage
| Main Entry: | dramatic |
| Part of Speech: | adjective |
| Definition: | exciting, moving |
| Synonyms: | affecting, breathtaking, comic, effective, emotional, expressive, farcical, histrionic, impressive, melodramatic, powerful, sensational, startling, striking, sudden, tense, theatrical, thespian, thrilling, tragic, vivid, climactic, electrifying, suspenseful, tragicomic |
| Antonyms: | normal, ordinary, unexciting, unmoving, usual, comedic, undramatic |
| Main Entry: | fleeting |
| Part of Speech: | adjective |
| Definition: | brief, transient |
| Synonyms: | cursory, ephemeral, evanescent, fading, flash in the pan*, flitting, flying, fugitive, impermanent, meteoric, momentary, passing, short, short-lived, sudden, temporary, transitory, vanishing, volatile, fugacious |
| Antonyms: | constant, continual, endless, enduring, lasting, lengthy, long, permanent, perpetual, long-lived |
* = informal/non-formal usage
| Main Entry: | haphazard |
| Part of Speech: | adjective |
| Definition: | without plan or organization |
| Synonyms: | accidental, aimless, any which way, arbitrary, careless, casual, chance, desultory, devil-may-care*, disorderly, disorganized, erratic, fluke, helter-skelter*, hit-or-miss*, incidental, indiscriminate, irregular, loose, offhand, purposeless, random, reckless, slapdash, slipshod, spontaneous, sudden, unconcerned, unconscious, uncoordinated, unexpected, unorganized, unpremeditated, unthinking, willy-nilly*, all over the map, any old way, designless, unconsidered, unmethodical, unsystematic |
| Antonyms: | careful, intentional, methodical, organized, planned, straight, systematic, designed, thought-out |
* = informal/non-formal usage
| Main Entry: | hasty |
| Part of Speech: | adjective |
| Definition: | speedy; without much thought |
| Synonyms: | abrupt, agile, brash, breakneck*, brief, brisk, careless, cursory, eager, expeditious, fast, fiery, fleet, fleeting, foolhardy, headlong, heedless, hurried, ill-advised, impatient, impetuous, impulsive, incautious, inconsiderate, madcap*, on the double*, passing, perfunctory, precipitate, prompt, pronto*, quick, quickie, rapid, rash, reckless, rushed, short, slapdash*, snappy*, sudden, superficial, swift, thoughtless, urgent, PDQ, chop-chop*, harefooted, quickened, slambang |
| Antonyms: | delayed, lazy, slow, lingering, loitering |
* = informal/non-formal usage
| Main Entry: | headlong |
| Part of Speech: | adjective |
| Definition: | dangerous, reckless |
| Synonyms: | abrupt, brash, breakneck, daredevil, daring, foolhardy, hasty, hurried, impetuous, impulsive, inconsiderate, precipitate, rash, rough, rushing, sudden, tempestuous, thoughtless, precipitant |
| Antonyms: | careful, cautious, wary, thoughtfully |
| Main Entry: | hurried |
| Part of Speech: | adjective |
| Definition: | quick, rushed |
| Synonyms: | abrupt, breakneck, brief, cursory, fast, hasty, headlong, hectic, impetuous, perfunctory, precipitate, precipitous, rushing, short, slapdash, speedy, sudden, superficial, swift, precipitant, subitaneous |
| Antonyms: | easily, leisurely, slow, unhurried, unrushed |
| Main Entry: | impatient |
| Part of Speech: | adjective |
| Definition: | unable, unwilling to wait |
| Synonyms: | abrupt, agog, antsy, anxious, appetent, ardent, athirst, avid, breathless, brusque, chafing, choleric, curt, demanding, dying to, eager, edgy, feverish, fretful, hasty, having short fuse, headlong, hot under collar, hot-tempered, impetuous, indignant, intolerant, irascible, irritable, itchy, keen, on pins and needles, quick-tempered, racing one's motor, restless, ripe*, snappy, straining, sudden, testy, thirsty, unforbearing, unindulgent, vehement, violent |
| Antonyms: | controlled, easy-going, enduring, forbearing, laid-back, patient, tolerant, waiting, willing |
* = informal/non-formal usage
| Main Entry: | impetuous |
| Part of Speech: | adjective |
| Definition: | acting without thinking |
| Synonyms: | abrupt, ardent, eager, fervid, fierce, furious, hasty, headlong, hurried, impassioned, impulsive, passionate, precipitate, precipitous, rash, restive, rushing, spontaneous, sudden, swift, unbridled, unexpected, unplanned, unpremeditated, unrestrained, unthinking, vehement, violent, going off deep end, precipitant, spur-of-the-moment, subitaneous, unreflecting |
| Antonyms: | calm, cautious, circumspect, considerate, reflective, sensible, thoughtful, wise |
| Main Entry: | impulsive |
| Part of Speech: | adjective |
| Definition: | tending to act without thought |
| Synonyms: | abrupt, ad-lib*, automatic, careless, devil-may-care*, emotional, extemporaneous, flaky*, hasty, headlong, impetuous, instinctive, intuitive, involuntary, mad, offhand, passionate, precipitate, quick, rash, spontaneous, sudden, swift, unexpected, unpredictable, unpremeditated, up-and-down*, violent, gone off deep end, hot-and-cold, jumping the gun, unconsidered, unmeditated, unprompted, winging it |
| Notes: | a compulsive eater is compelled by an exterior force to eat and eats constantly; an impulsive eater is impelled (has an impulse) to eat, occurring sporadically, and eats only from time to time |
| Antonyms: | cautious, considering, heedful, thoughtful, wise, premeditative |
* = informal/non-formal usage
| Main Entry: | short |
| Part of Speech: | adverb |
| Definition: | abruptly |
| Synonyms: | aback, forthwith, sudden, suddenly, unaware, unawares, unexpectedly, by surprise, unanticipatedly, without delay, without hesitation, without warning |
| Antonyms: | long |
| Main Entry: | suddenly |
| Part of Speech: | adverb |
| Definition: | unexpectedly |
| Synonyms: | aback, forthwith, quickly, short, sudden, swiftly, unaware, unawares, abruptly, all at once, all of a sudden, asudden, on spur of moment, unanticipatedly, without warning |
| Antonyms: | slowly, expectedly |
| Main Entry: | surprising |
| Part of Speech: | adjective |
| Definition: | unexpected |
| Synonyms: | accidental, amazing, astonishing, chance, extraordinary, fortuitous, impulsive, out of the blue*, remarkable, shocking, startling, stunning, sudden, unforeseen, unpredictable, wonderful, electrifying, from left field, unanticipated, unpredicted, without warning |
* = informal/non-formal usage
| Main Entry: | swift |
| Part of Speech: | adjective |
| Definition: | very fast |
| Synonyms: | abrupt, breakneck, expeditious, express, fleet, flying, hasty, headlong, hurried, nimble, on the double*, precipitate, prompt, pronto, quick, rapid, ready, short, short-lived, snappy*, spanking*, speedy, sudden, unexpected, winged, alacritous, barrelling, cracking, double-quick, fleet-footed, in nothing flat, like crazy, like mad, screaming, shaking a leg, speedball, supersonic |
| Antonyms: | delayed, slow, sluggish |
* = informal/non-formal usage
| Main Entry: | unawares |
| Part of Speech: | adverb |
| Definition: | without warning; suddenly |
| Synonyms: | aback, accidentally, carelessly, inadvertently, mistakenly, short, sudden, unconsciously, unexpectedly, unintentionally, unprepared, unwittingly, abruptly, by accident, by mistake, by surprise, ignorantly, off guard, surprisingly, unknowingly, unready |
| Antonyms: | knowingly, consciously |
| Main Entry: | unexpected |
| Part of Speech: | adjective |
| Definition: | surprising |
| Synonyms: | abrupt, accidental, amazing, astonishing, chance, fortuitous, impetuous, impulsive, instantaneous, out of the blue*, payback, prodigious, staggering, startling, stunning, sudden, swift, unforeseen, unheralded, unpredictable, wonderful, electrifying, eye-opening, from left field, not bargained for, not in the cards, unanticipated, unlooked-for, unpredicted |
| Antonyms: | expected |
* = informal/non-formal usage
| Main Entry: | unforeseen |
| Part of Speech: | adjective |
| Definition: | surprising |
| Synonyms: | abrupt, accidental, out of the blue*, startling, sudden, surprise, unexpected, from left field, not bargained for, unanticipated, uncalculated, unlooked-for |
| Antonyms: | expected, foreseen, predictable, predicted |
* = informal/non-formal usage
| Main Entry: | quick |
| Part of Speech: | adjective |
| Definition: | fast, speedy |
| Synonyms: | abrupt, accelerated, active, agile, alert, animated, breakneck*, brief, brisk, cursory, curt, double time*, energetic, expeditious, express, fleet, flying, hasty, headlong, hurried, immediate, impatient, impetuous, instantaneous, keen, lively, mercurial, nimble, on the double*, perfunctory, posthaste, prompt, pronto*, rapid, snappy, spirited, sprightly, spry, sudden, swift, winged*, ASAP, a move on, expeditive, going, harefooted, move it, the lead out |
| Antonyms: | lazy, slow, sluggish |
* = informal/non-formal usage
| Main Entry: | abrupt |
| Part of Speech: | adjective |
| Definition: | happening suddenly and unexpectedly |
| Synonyms: | hasty, hurried, jerky, precipitate, precipitous, quick, rushing, sudden, surprising, unceremonious, unexpected, unforeseen, unanticipated |
| Antonyms: | deliberate, expansive, gradual, leisurely, at ease |
| Main Entry: | acute |
| Part of Speech: | adjective |
| Definition: | very important |
| Synonyms: | critical, crucial, dangerous, decisive, desperate, dire, essential, grave, serious, severe, sudden, urgent, vital, afflictive |
| Antonyms: | unimportant, not serious |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.
