Englishrapid
adjective
his rapid rise to stardom |
they made a rapid exit:
quick, fast, swift, speedy, high-speed, expeditious, express, brisk, lively, prompt, flying, fleeting, lightning, meteoric, overnight, whirlwind, fast-track, whistle-stop;
sudden, instantaneous, immediate, instant, hurried, hasty, abrupt, sharp, precipitate, breakneck, headlong;
informal p.d.q. (pretty damn quick);
literary fleet;
rare alacritous, volant.
▷antonyms slow, leisurely.
rapid Oxford Dictionary of English