jurisprudence vs common-law marriage

jurisprudence and common-law marriage both are nouns.

Word	Noun	Adjective	Verb	Adverb
jurisprudence	Yes	No	No	No
common-law marriage	Yes	No	No	No

jurisprudence (noun)	common-law marriage (noun)
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do	a marriage relationship created by agreement and cohabitation rather than by ceremony
the collection of rules imposed by authority