watchword vs rallying cry

watchword and rallying cry both are nouns.

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

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

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

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