intermarriage vs exogamy

intermarriage and exogamy both are nouns.

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

As nouns, intermarriage and exogamy are synonyms defined as:

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

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