watchword vs war cry

watchword and war cry both are nouns.

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

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

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

watchword (noun)	war 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