Synonyms of impatient

1 Syllable
quick, cross, keen, curt, ripe
2 Syllables
antsy, itchy, straining, greedier, twitchy, greedy, tetchier, thirstier, piggish, wearier, headlong, thirstiest, thirsty, edgier, hasty, restless, hastier, fretful, grabby, hoggish, keener, breathless, whiny, agog, testy, chafing, crosser, avid, droughty, thirsting, hastiest, violent, weary, quicker, keenest, anxious, sudden, testier, high-strung, ardent, tetchy, abrupt, quickest, snappy, athirst, edgy, grabbier, weariest, asap, brusque, eager
3 Syllables
demanding, fevered, choleric, petulant, indignant, vehement, impetuous, bone-tired, noncompliant, juiceless, feverish, volcanic, appetent, uneasy, nail-biting, fidgety, warmblooded
4 Syllables
unforbearing, unindulgent, irascible, quick-tempered, excitable, hot-tempered, cottonmouthed, irritable, overanxious, solicitous, intolerant, harefooted
5 Syllables
temperamental, declinatory