speedy

1 moving, proceeding, or acting with great speed a speedy worker but not a very careful one, unfortunately Synonyms blistering, breakneck, breathless, brisk, dizzy, fleet, fleet-footed, flying, galloping, hasty, hot, lightning, nippy, quick, rapid, rapid-fire, rattling, snappy, fast, splitting, swift, whirlwind, zippyRelated Words expeditious, prompt, ready; accelerated, hastened, hurried, quickened, rushed; breathtaking; energetic, strenuous, strong, vigorous; high-speed; rush; ultrafast, ultrarapidNear Antonyms crawling, dallying, dawdling, dillydallying, dragging, laggard, languid, lingering, plodding, poking, poky (or pokey), slowish, sluggish, unhurried; deliberate, leisurely, measured; dilatory, late, tardy; ultraslowAntonyms slow

2 done, carried out, or given without delay I was surprised by and pleased with the company's speedy response to my complaints Synonyms immediate, punctual, prompt, timelyRelated Words apt, quick, ready, swift, willing; opportune, seasonable; earlyNear Antonyms delinquent, latish, overdue; behind, behindhand, delayed, detained; dilatory, laggard, slowAntonyms belated, late, tardy