Synonyms of groan

1 Syllable
sigh, caw, cry, cried, grunt, sang, howl, meow, creak, moo, sung, sob, sing, kvetch, chirr
2 Syllables
nickers, soloed, whinny, howled, questing, griped, complain, whinnies, sighed, beefed, snivels, creaked, bawling, complains, grunting, quested, sighing, grunted, howling, keened, whine, grumbled, griping, grouse, mutters, mutter, yoo-hoo, nicker, creaking, chirring, grumble, snivel, soloing, gripe
3 Syllables
bellyaching, objection, snivelling, carolling, singsonged, caroled, muttering, sniveled, sniveling, muttered, complained, caroling
4 Syllables
serenaded, ululate, ululation, cantillate, vocalize, vocalized, serenading, vocalizing