endogamy vs wedlock

endogamy and wedlock both are nouns.

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

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

endogamy: marriage within one's own tribe or group as required by custom or law
wedlock: the state of being a married couple voluntarily joined for life (or until divorce)

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

endogamy (noun)	wedlock (noun)
marriage within one's own tribe or group as required by custom or law	the state of being a married couple voluntarily joined for life (or until divorce)