watchword vs shibboleth

watchword and shibboleth both are nouns.

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

As nouns, shibboleth is a hypernym of watchword; that is, shibboleth is a word with a broader meaning than watchword:

Other hypernyms of watchword include catchword, motto, slogan.

watchword (noun)	shibboleth (noun)
a secret word or phrase known only to a restricted group	a manner of speaking that is distinctive of a particular group of people
a slogan used to rally support for a cause	a favorite saying of a group, organization or individual