birthright vs patrimony

birthright and patrimony both are nouns.

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

As nouns, birthright and patrimony are synonyms defined as:

birthright and patrimony: an inheritance coming by right of birth (especially by primogeniture)

birthright (noun)	patrimony (noun)
a right or privilege that you are entitled to at birth	an inheritance coming by right of birth (especially by primogeniture)
an inheritance coming by right of birth (especially by primogeniture)	a church endowment