watchword vs password

watchword and password both are nouns.

Word	Noun	Adjective	Verb	Adverb
watchword	Yes	No	No	No
password	Yes	No	No	No

As nouns, watchword and password are synonyms defined as:

watchword and password: a secret word or phrase known only to a restricted group

Other synonyms of watchword include countersign, parole, word.

watchword (noun)	password (noun)
a secret word or phrase known only to a restricted group	a secret word or phrase known only to a restricted group
a slogan used to rally support for a cause