motto vs battle cry

motto and battle cry both are nouns.

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

As nouns, battle cry is a hyponym of motto; that is, battle cry is a word with a more specific, narrower meaning than motto:

Other hyponyms of motto include catch phrase, catchphrase, mantra, cry, rallying cry, war cry, watchword.

motto (noun)	battle cry (noun)
a favorite saying of a group, organization or individual	a yell intended to rally a group of soldiers in battle
	a slogan used to rally support for a cause