phratry vs sept

phratry and sept both are nouns.

Word	Noun	Adjective	Verb	Adverb
phratry	Yes	No	No	No
sept	Yes	No	No	No

As nouns, phratry and sept are synonyms defined as:

Other synonyms of phratry include family, family line, folk, kinfolk, kinsfolk.

phratry (noun)	sept (noun)
people descended from a common ancestor	people descended from a common ancestor