| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | happening suddenly and unexpectedly |
| Synonyms: | hasty, hurried, jerky, precipitate, precipitous, quick, rushing, sudden, surprising, unanticipated, unceremonious, unexpected, unforeseen |
| Antonyms: | at ease, deliberate, expansive, gradual, leisurely |
| Main Entry: | early |
| Part of Speech: | adjective |
| Definition: | sooner than expected |
| Synonyms: | advanced, ahead of time, anticipative, anticipatory, before appointed time, beforehand, direct, immature, immediate, matinal, on short notice, on the dot, overearly, oversoon, preceding, precipitant, precocious, preexistent, premature, previous, prompt, pronto, punctual, quick, seasonable, soon, speedy, unanticipated, unexpected, untimely |
| Antonyms: | later |
| Main Entry: | precipitous/precipitate |
| Part of Speech: | adjective |
| Definition: | fast, sudden; impulsive; initial |
| Synonyms: | abrupt, breakneck, brief, frantic, gone off half-cocked, harum-scarum, hasty, headlong, heedless, hurried, ill-advised, impatient, impetuous, indiscreet, jump the gun, madcap, off the hip, off the top of head, plunging, precipitant, quick, rapid, rash, reckless, refractory, rushing, subitaneous, swift, unanticipated, uncontrolled, unexpected, unforeseen, violent, willful, without warning |
| Antonyms: | careful, cautious, slow |
| Main Entry: | premature |
| Part of Speech: | adjective |
| Definition: | earlier in occurrence than anticipated |
| Synonyms: | a bit previous, abortive, early on, embryonic, forward, green*, immature, incomplete, inopportune, overearly, oversoon, precipitate, predeveloped, previous, raw*, soon, unanticipated, undeveloped, unfledged, unripe, untimely |
| Antonyms: | backward, delayed, late, mature, overdue |
| Main Entry: | surprising |
| Part of Speech: | adjective |
| Definition: | unexpected |
| Synonyms: | accidental, amazing, astonishing, chance, electrifying, extraordinary, fortuitous, from left field, impulsive, out of the blue, remarkable, shocking, startling, stunning, sudden, unanticipated, unforeseen, unpredictable, unpredicted, without warning, wonderful |
| Main Entry: | unexpected |
| Part of Speech: | adjective |
| Definition: | surprising |
| Synonyms: | abrupt, accidental, amazing, astonishing, chance, electrifying, eye-opening, fortuitous, from left field, impetuous, impulsive, instantaneous, not bargained for, not in the cards, out of the blue, payback, prodigious, staggering, startling, stunning, sudden, swift, unanticipated, unforeseen, unheralded, unlooked-for, unpredictable, unpredicted, wonderful |
| Antonyms: | expected |
| Main Entry: | unforeseen |
| Part of Speech: | adjective |
| Definition: | surprising |
| Synonyms: | abrupt, accidental, from left field, not bargained for, out of the blue, startling, sudden, surprise, unanticipated, uncalculated, unexpected, unlooked-for |
| Antonyms: | expected, foreseen, predictable, predicted |
| Main Entry: | unheralded |
| Part of Speech: | adjective |
| Definition: | unexpected |
| Synonyms: | unannounced, unanticipated, unpredicted, without warning |
| Antonyms: | announced, expected, predicted |
| Main Entry: | unannounced |
| Part of Speech: | adjective |
| Definition: | not disclosed |
| Synonyms: | surprise, unanticipated, undisclosed, unheralded, unpublished, withheld |
| Antonyms: | announced |