marriage vs marital status

marriage and marital status both are nouns.

Word	Noun	Adjective	Verb	Adverb
marriage	Yes	No	No	No
marital status	Yes	No	No	No

As nouns, marital status is a hypernym of marriage; that is, marital status is a word with a broader meaning than marriage:

marriage: the state of being a married couple voluntarily joined for life (or until divorce)
marital status: the condition of being married or unmarried

marriage (noun)	marital status (noun)
the act of marrying; the nuptial ceremony	the condition of being married or unmarried
two people who are married to each other
the state of being a married couple voluntarily joined for life (or until divorce)
a close and intimate union