swift

Synonyms

blistering, breakneck, breathless, brisk, dizzy, fast, fleet, fleet-footed, flying, galloping, hasty, hot, lightning, nippy, quick, rapid, rapid-fire, rattling, snappy, speedy, splitting, whirlwind, zippy;

Antonyms

slow;

Near Antonyms

crawling, dallying, dawdling, dillydallying, dragging, laggard, languid, lingering, plodding, poking, poky (or pokey), slowish, sluggish, unhurried;

deliberate, leisurely, measured;

dilatory, late, tardy;

ultraslow;

Related Words

expeditious, prompt, ready;

accelerated, hastened, hurried, quickened, rushed;

breathtaking;

energetic, strenuous, strong, vigorous;

high-speed;

rush;

ultrafast, ultrarapid;

Synonyms

apace, briskly, double-quick, fast, fleetly, full tilt, hastily, hot, lickety-split, posthaste, presto, pronto, quick, quickly, rapidly, snappily, soon, speedily, swiftly;

Antonyms

slow, slowly;

Near Antonyms

laggardly, lingeringly, ploddingly, sluggishly;

deliberately, leisurely;

belatedly, delinquently, tardily;

Related Words

immediately, promptly, readily;

impetuously, impulsively, rashly, recklessly;

abruptly, suddenly;

energetically, vigorously;

Phrases

a mile a minute, at full throttle, at full tilt, by leaps and bounds, in a hurry, in short order, like a shot, like gangbusters, like wildfire;