kinfolk vs kinsfolk

kinfolk and kinsfolk both are nouns.

Word	Noun	Adjective	Verb	Adverb
kinfolk	Yes	No	No	No
kinsfolk	Yes	No	No	No

As nouns, kinfolk and kinsfolk are synonyms defined as:

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

kinfolk (noun)	kinsfolk (noun)
people descended from a common ancestor	people descended from a common ancestor