matrimony vs wedlock

matrimony and wedlock both are nouns.

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

As nouns, matrimony and wedlock are synonyms defined as:

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

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

matrimony (noun)	wedlock (noun)
the ceremony or sacrament of marriage	the state of being a married couple voluntarily joined for life (or until divorce)
the state of being a married couple voluntarily joined for life (or until divorce)