Synonyms of speedy in English:

speedy


See US English definition of speedy

See UK English definition of speedy

See Spanish definition of rápido

adjective

1‘a speedy reply’

SYNONYMS
rapid, swift, quick, fast, prompt, immediate, expeditious, express, brisk, sharp, unhesitating
whirlwind, lightning, meteoric, overnight, fast-track, whistle-stop
hasty, hurried, precipitate, precipitous, breakneck, summary, on-the-spot, rushed
informal p.d.q., pretty damn quick, snappy, quickie
rare alacritous
ANTONYMS

slow, leisurely, dilatory

2‘a speedy hatchback’

SYNONYMS
fast, fast-moving, high-speed
informal nippy, zippy
literary fleet, fleet of foot, fleet-footed
rare volant
ANTONYMS

slow, plodding