folk vs schottische

folk and schottische both are nouns.

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

As nouns, schottische is a hyponym of folk; that is, schottische is a word with a more specific, narrower meaning than folk:

folk: the traditional and typically anonymous music that is an expression of the life of people in a community
schottische: music performed for dancing the schottische

folk (noun)	schottische (noun)
the traditional and typically anonymous music that is an expression of the life of people in a community	a German round dance resembling a slow polka
people in general (often used in the plural)	music performed for dancing the schottische
a social division of (usually preliterate) people
people descended from a common ancestor