hack writer vs writer

hack writer and writer both are nouns.

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

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

hack writer: a mediocre and disdained writer
writer: writes (books or stories or articles or the like) professionally (for pay)

Other hypernyms of hack writer include author.

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