bellow vs hollering

bellow and hollering both are nouns.

Word	Noun	Adjective	Verb	Adverb
bellow	Yes	No	Yes	No
hollering	Yes	No	No	No

As nouns, bellow and hollering are synonyms defined as:

bellow and hollering: a very loud utterance (like the sound of an animal)

Other synonyms of bellow include bellowing, holla, holler, hollo, holloa, roar, roaring, yowl.

bellow (noun)	hollering (noun)
a very loud utterance (like the sound of an animal)	a very loud utterance (like the sound of an animal)

bellow (verb)	hollering (verb)
shout loudly and without restraint
make a loud noise, as of animal