inmarriage vs endogamy

inmarriage and endogamy both are nouns.

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

As nouns, inmarriage and endogamy are synonyms defined as:

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

Other synonyms of inmarriage include intermarriage.

inmarriage (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