Synonymes fast (anglais)

Adjectif
- characteristic : dissipated, dissolute, extravagant, prodigal, profligate, reckless
- characteristic : firm, adherent, fixed, immovable, secure, stanch, steadfast
- characteristic : loyal, faithful, steadfast, deep, profound, sound
- characteristic : deceptive, inconstant, insincere, unreliable
- mental condition : active, alert, energetic, quick
- property : quick, fleet, brisk, accelerated, expeditious, rapid, swift
- property : resistant, impregnable, strong
- property : inescapable, inextricable
- property : fastened, closed, set, tenacious, fixed, tight
- state : permanent, enduring, eternal, lasting

Adverbe
- characteristic : extravagantly, prodigally, recklessly, wildly
- property : firmly, fixedly, securely, tenaciously, tightly
- time : quickly, expeditiously, rapidly, speedily, swiftly