rapid, fast, quick, swift, speedy, prompt

spicy, steep, fast, sharp, harsh, pungent

immediate, instant, urgent, prompt, quick, instantaneous

extremist, fast, swift, rapid

express, fast, rapid, quick, speedy, swift

light, easy, thin, volatile, frivolous, gossamer

stiff, horny, firm, hard, rigid, tight

fast

hasty, rash, hurried, precipitous, fast, hasteful

fast

colorfast, fast, lightfast, water-fast

lively, alive, vivid, spirited, animated, vivacious

unfailing, trustable, loyal, faithful, fast