n. 25B6; adjective
a fast pace : SPEEDY, quick, swift, rapid; fast-moving, high-speed, turbo, sporty; accelerated, express, blistering, breakneck, pell-mell; hasty, hurried; informal nippy, zippy, scorching, blinding, supersonic; Brit. informal cracking; poetic/literary fleet.
he held the door fast : SECURE, fastened, tight, firm, closed, shut, to; immovable, unbudgeable.
a fast colour : INDELIBLE, lasting, permanent, stable.
fast friends : LOYAL, devoted, faithful, firm, steadfast, staunch, true, boon, bosom, inseparable; constant, enduring, unswerving.
a fast woman : PROMISCUOUS, licentious, dissolute, debauched, impure, unchaste, wanton, abandoned, of easy virtue; sluttish, whorish; intemperate, immoderate, shameless, sinful, immoral; informal easy, tarty; Brit. informal slaggy; N. Amer. informal roundheeled; dated loose.
slow, loose, temporary, chaste.
25B6; adverb
she drove fast : QUICKLY, rapidly, swiftly, speedily, briskly, at speed, at full tilt; hastily, hurriedly, in a hurry, post-haste, pell-mell; like a shot, like a flash, on the double, at the speed of light; informal double quick, p.d.q. (pretty damn quick), nippily, like (greased) lightning, hell for leather, like mad, like the wind, like a scalded cat, like a bat out of hell; Brit. informal like the clappers, at a rate of knots, like billy-o; N. Amer. informal lickety-split; poetic/literary apace.
his wheels were stuck fast : SECURELY, firmly, immovably, fixedly.
he's fast asleep : DEEPLY, sound, completely.
she lived fast and dangerously : WILDLY, dissolutely, intemperately, immoderately, recklessly, self-indulgently, extravagantly.
slowly.