battle cry vs war whoop

battle cry and war whoop both are nouns.

Word	Noun	Adjective	Verb	Adverb
battle cry	Yes	No	No	No
war whoop	Yes	No	No	No

As nouns, battle cry and war whoop are synonyms defined as:

battle cry and war whoop: a yell intended to rally a group of soldiers in battle

Other synonyms of battle cry include rallying cry, war cry.

battle cry (noun)	war whoop (noun)
a yell intended to rally a group of soldiers in battle	a yell intended to rally a group of soldiers in battle
a slogan used to rally support for a cause