F.a.s.t.

Synonyms for "f.a.s.t." (464 found)

Ranked by relevance and common usage.

Closest matches (93)

Strong matches (139)

deep rooted deep seated deep-dyed deep-fixed deep-rooted deep-seated deep-set deep-settled deeply degenerate dependable devoted diet dissipated dissolute dissolutely double quick double-dyed double-quick durable

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dustproof dusttight dyed-in-the-wool eagle-winged easy eat sparingly ecclesiastical calendar encratism eschewal established expeditious expeditiously extravagant extravagantly fadeless faithful faithworthy fast breaking fast paced fastened feast fecklessly fiducial firm as gibraltar fish day fixed fixedly flat-out fortified free friday fruitarianism full tilt gallant galloping gasproof gastight gay glued go hungry great grounded gymnosophy hair trigger hair-trigger hand over fist hand over hand hastily hasty headlong held hell bent hell for leather hell-bent hell-bent for election hermetic hermetically sealed high and dry high velocity high-speed holy day holytide hurried hurriedly hustling immediately immobile immoral immovable immovably impacted imperturbable impervious implanted in a flash in a twinkling in a wink in double time in double-quick time in equilibrium in high in high gear in nothing flat in seven-league boots in short order incontinent incorrigible inculcated indecorous indecorously indelible inextricable infixed ingrain ingrained inseparably instantaneous instilled intemperate intemperately

Adverb(2 words)

deeply firmly

Adjective(7 words)

degenerate degraded dissipated dissolute firm flying immobile

Adjective(6 words)

easy firm fortified gain immobile impenetrable

Noun(4 words)

express express train fast train fasting

Related words (232)

invariable inveterate invincible irresponsible irreversible jammed keen lacing lack of food lascivious lasting lecherous lecherously lenten diet lenten entertainment lenten fare lewd libidinous licentious licentiously

Show 188 more words

lickety split lickety-cut lickety-split liege light footed light of heel light-footed lightproof lighttight like a flash like a shot like wildfire lively long established long-established loose loosely loyal lustful lustfully meager diet mercurial meteoric moored near nephalism nimble nimble footed nimble-footed not eat of easy virtue oilproof oiltight on the double packed permanent persistent plain living post posthaste precipitate predictable prestissimo profligate promiscuous promiscuously prompt promptly pronto pythagoreanism pythagorism quick as lightning quick as thought raffish rainproof raintight rakehell rakehellish rakehelly raking rakish randy rapidly rechabitism reckless recklessly refraining refrainment reliable resolute rigging right rooted rope running sabbath salacious scurrying sealed secure secured securely self-denial self-indulgent set settled settled in habit sexual abstinence shakerism sharp short acting short commons shut fast simple diet smart smokeproof smoketight smooth snappily snappy snug solid solidly soon sound soundly spanking spare diet spartan fare speedily sporty stable starvation diet staunch steadfast steadfastly steady stoicism stormproof stormtight straightaway stranded strong stuck stuck fast substantial sudden sunday sure surefire sybaritic sybaritically taped teetotalism tested tethered the pledge thorough tied tightly total abstinence transfixed tried tried and true trippingly true truehearted trustworthy trusty turbulent unbridled under forced draft unfading unfailing unflappable unflinching unrestrained unrestrainedly unshakable unshakably unshakeable unshakeably unwavering vegetarianism vivace wanton wantonly water-repellant waterproof watertight wedged well-balanced well-founded well-grounded whip and spur wild wildly windproof windtight windy with all haste with all speed with giant strides with rapid strides with speed without nerves xerophagia xerophagy

Adjective(6 words)

libertine loyal profligate quick riotous truehearted

Adjective(11 words)

light precipitant promiscuous rapid secure slutty sound stable stuck swift zippy

Adverb(6 words)

quickly rapidly securely speedily swiftly tightly

Adverb(1 words)

tight

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.