Synonyms of abrupt

1 Syllable

swift, quick, brief, steep, stark, gruff

2 Syllables

starker, pointblank, gnomic, steeper, headlong, briefest, snippy, rushing, starkest, tersest, hastiest, briefer, ruder, crusty, quickest, steeping, rudest, quicker, swiftest, gruffer, crustier, gruffest, hasty, asap, brusque, snippier, sudden, swifter, hurried, terser, steepest, jerky, speedball, hastier

3 Syllables

barrelling, double-quick, fleet-footed, discourteous, plain-spoken, subito, mannerless, outspoken, uncivil, impatient, fleetfooted, surprising, impetuous, hot-and-cold, unprompted

4 Syllables

unforbearing, impulsive, unlooked-for, unreticent, declivitous, precipitous, harefooted, unexpected, unforeseen

5 Syllables

unceremonious, precipitate, unmeditated

6 Syllables

unanticipated