exogamy vs wedlock

exogamy and wedlock both are nouns.

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

As nouns, wedlock is a hypernym of exogamy; that is, wedlock is a word with a broader meaning than exogamy:

exogamy: marriage to a person belonging to a tribe or group other than your own as required by custom or law
wedlock: the state of being a married couple voluntarily joined for life (or until divorce)

Other hypernyms of exogamy include marriage, matrimony, spousal relationship, union.

exogamy (noun)	wedlock (noun)
marriage to a person belonging to a tribe or group other than your own as required by custom or law	the state of being a married couple voluntarily joined for life (or until divorce)