folks vs folk

folks and folk both are nouns.

Word	Noun	Adjective	Verb	Adverb
folks	Yes	No	No	No
folk	Yes	No	No	No

As nouns, folks and folk are synonyms defined as:

Other synonyms of folks include common people.

folks (noun)	folk (noun)
your parents	the traditional and typically anonymous music that is an expression of the life of people in a community
people in general (often used in the plural)	people in general (often used in the plural)
	a social division of (usually preliterate) people
	people descended from a common ancestor