battle cry vs yell

battle cry and yell both are nouns.

Word	Noun	Adjective	Verb	Adverb
battle cry	Yes	No	No	No
yell	Yes	No	Yes	No

As nouns, yell is a hypernym of battle cry; that is, yell is a word with a broader meaning than battle cry:

Other hypernyms of battle cry include call, cry, outcry, shout, vociferation.

battle cry (noun)	yell (noun)
a yell intended to rally a group of soldiers in battle	a loud utterance; often in protest or opposition
a slogan used to rally support for a cause	a loud utterance of emotion (especially when inarticulate)

battle cry (verb)	yell (verb)
	utter or declare in a very loud voice
	utter a sudden loud cry