exogamy vs intermarriage

exogamy and intermarriage both are nouns.

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

As nouns, exogamy and intermarriage are synonyms defined as:

exogamy and intermarriage: marriage to a person belonging to a tribe or group other than your own as required by custom or law

exogamy (noun)	intermarriage (noun)
marriage to a person belonging to a tribe or group other than your own as required by custom or law	marriage within one's own tribe or group as required by custom or law
	marriage to a person belonging to a tribe or group other than your own as required by custom or law