wedlock vs marriage

wedlock and marriage both are nouns.

Word	Noun	Adjective	Verb	Adverb
wedlock	Yes	No	No	No
marriage	Yes	No	No	No

As nouns, wedlock and marriage are synonyms defined as:

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

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

wedlock (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