bellow vs outcry

bellow and outcry both are nouns.

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

As nouns, outcry is a hypernym of bellow; that is, outcry is a word with a broader meaning than bellow:

Other hypernyms of bellow include call, cry, shout, vociferation, yell.

bellow (noun)	outcry (noun)
a very loud utterance (like the sound of an animal)	a loud utterance; often in protest or opposition

bellow (verb)	outcry (verb)
shout loudly and without restraint	utter aloud; often with surprise, horror, or joy
make a loud noise, as of animal	shout louder than