shibboleth vs watchword

shibboleth and watchword both are nouns.

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

As nouns, watchword is a hyponym of shibboleth; that is, watchword is a word with a more specific, narrower meaning than shibboleth:

Other hyponyms of shibboleth include catch phrase, catchphrase, mantra, battle cry, cry, rallying cry, war cry.

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