Rapid
Synonyms Quick, swift, high-speed, express, lively, flying, lightning, overnight, fast-track, sudden, immediate, hurried, abrupt, precipitate, headlong, fleet, volant, fast, speedy, expeditious, brisk, prompt, fleeting, meteoric, whirlwind, whistle-stop, instantaneous, instant, hasty, sharp, breakneck, p.d.q. (pretty damn quick), and alacritous.
Example Sentences
The rapid train quickly departed.
His rapid response surprised everyone.
Rapid winds shook the trees.
Rapid growth boosted the company.