watchword vs battle cry

watchword and battle cry both are nouns.

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

As nouns, watchword and battle cry are synonyms defined as:

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

watchword (noun)	battle cry (noun)
a secret word or phrase known only to a restricted group	a yell intended to rally a group of soldiers in battle
a slogan used to rally support for a cause	a slogan used to rally support for a cause