endowment vs patrimony

endowment and patrimony both are nouns.

Word	Noun	Adjective	Verb	Adverb
endowment	Yes	No	No	No
patrimony	Yes	No	No	No

As nouns, patrimony is a hyponym of endowment; that is, patrimony is a word with a more specific, narrower meaning than endowment:

Other hyponyms of endowment include chantry.

endowment (noun)	patrimony (noun)
the act of endowing with a permanent source of income	an inheritance coming by right of birth (especially by primogeniture)
natural abilities or qualities	a church endowment
the capital that provides income for an institution