hereditary vs familial

hereditary and familial both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hereditary	No	Yes	No	No
familial	No	Yes	No	No

As adjectives, hereditary and familial are synonyms defined as:

hereditary and familial: occurring among members of a family usually by heredity

Other synonyms of hereditary include genetic, inherited, transmissible, transmitted.

hereditary (adjective)	familial (adjective)
occurring among members of a family usually by heredity	relating to or having the characteristics of a family
inherited or inheritable by established rules (usually legal rules) of descent	occurring among members of a family usually by heredity