Synonyms of growling

1 Syllable
gnarr, snarl, roll, grunt, howl, moan, bark, roar, gnarl
2 Syllables
grousing, croupier, peevish, breathy, hoarser, husky, rumble, thunder, breathier, croupy, bellow, waspy, huskier, grumble, glottal
3 Syllables
guttural