intermarriage vs endogamy

intermarriage and endogamy both are nouns.

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

As nouns, intermarriage and endogamy are synonyms defined as:

intermarriage and endogamy: marriage within one's own tribe or group as required by custom or law

Other synonyms of intermarriage include inmarriage.

intermarriage (noun)	endogamy (noun)
marriage within one's own tribe or group 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