kinsfolk vs kinfolk

kinsfolk and kinfolk both are nouns.

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

As nouns, kinsfolk and kinfolk are synonyms defined as:

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

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