folk writer vs writer

folk writer and writer both are nouns.

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

As nouns, writer is a hypernym of folk writer; that is, writer is a word with a broader meaning than folk writer:

folk writer: a writer of folktales
writer: writes (books or stories or articles or the like) professionally (for pay)

Other hypernyms of folk writer include author.

folk writer (noun)	writer (noun)
a writer of folktales	writes (books or stories or articles or the like) professionally (for pay)
	a person who is able to write and has written something