spousal relationship vs marriage

spousal relationship and marriage both are nouns.

Word	Noun	Adjective	Verb	Adverb
spousal relationship	Yes	No	No	No
marriage	Yes	No	No	No

As nouns, spousal relationship and marriage are synonyms defined as:

spousal relationship and marriage: the state of being a married couple voluntarily joined for life (or until divorce)

Other synonyms of spousal relationship include matrimony, union, wedlock.

spousal relationship (noun)	marriage (noun)
the state of being a married couple voluntarily joined for life (or until divorce)	the act of marrying; the nuptial ceremony
	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