| Main Entry: | instantaneous |
| Part of Speech: | adjective |
| Definition: | immediate |
Synonyms: |
direct, fast, hair-trigger, in a flash, instant, momentary, quick, rapid, spontaneous, transitory |
Antonyms: |
delayed, eventual, late, later |
| Main Entry: | brief |
| Part of Speech: | adjective |
| Definition: | short in time |
Synonyms: |
concise, curtailed, ephemeral, fast, fleeting, hasty, instantaneous, little, meteoric, momentary, passing, quick, short-lived, short-term, swift, temporary, transient, transitory |
Antonyms: |
enduring, lasting, lengthy, long, long-lived |
| Main Entry: | instant |
| Part of Speech: | adjective |
| Definition: | immediate, urgent |
Synonyms: |
burning*, clamant, contemporary, crying*, current, dire, direct, exigent, existent, extant, fast, imperative, importunate, insistent, instantaneous, on-the-spot, present, present-day, pressing, prompt, quick, split-second |
Antonyms: |
delayed, eventual, late, later |
| Main Entry: | momentary |
| Part of Speech: | adjective |
| Definition: | brief, fleeting |
Synonyms: |
cursory, dreamlike, ephemeral, evanescent, flashing, flitting, flying, fugacious, fugitive, gone in flash, hasty, impermanent, impulsive, in wink of an eye, instantaneous, like lightning, passing, quick, shifting, short, short-lived, spasmodic, summary, temporary, transient, transitory, vanishing, volatile |
| Notes: | momentary means fleeting, brief; momentous means significant and having great consequence |
Antonyms: |
lasting, long-lasting, permanent, staying |
| Main Entry: | prompt |
| Part of Speech: | adjective |
| Definition: | early, responsive |
Synonyms: |
alert, apt, brisk, eager, efficient, expeditious, immediate, instant, instantaneous, on the ball, on the button, on the dot, on the nose, on time, precise, punctual, quick, rapid, ready, smart, speedy, swift, timely, unhesitating, vigilant, watchful, wide-awake, willing |
Antonyms: |
late, negligent, slow, tardy |
| Main Entry: | quick |
| Part of Speech: | adjective |
| Definition: | fast, speedy |
Synonyms: |
ASAP, a move on, abrupt, accelerated, active, agile, alert, animated, breakneck, brief, brisk, cursory, curt, double time, energetic, expeditious, expeditive, express, fleet, flying, going, harefooted, hasty, headlong, hurried, immediate, impatient, impetuous, instantaneous, keen, lively, mercurial, move it, nimble, on the double, perfunctory, posthaste, prompt, pronto, rapid, snappy, spirited, sprightly, spry, sudden, swift, the lead out, winged* |
Antonyms: |
lazy, slow, sluggish |
| 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: | presto |
| Part of Speech: | adjective |
| Definition: | quickly |
Synonyms: |
fast, instantaneous, magic, rapidly, suddenly |
| Main Entry: | instant |
| Part of Speech: | adjective, noun |
Related
Adjectives: |