clamour vs outcry

clamour and outcry both are nouns.

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

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

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

clamour (noun)	outcry (noun)
loud and persistent outcry from many people	a loud utterance; often in protest or opposition

clamour (verb)	outcry (verb)
utter or proclaim insistently and noisily	utter aloud; often with surprise, horror, or joy
make loud demands	shout louder than