Nouns

(n)bellow, bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowla very loud utterance (like the sound of an animal)“his bellow filled the hallway”

Verbs

(v)howl, wrawl, yammer, yowlcry loudly, as of animals“The coyotes were howling in the desert”
(v)yowl, caterwaulutter shrieks, as of cats