polemist vs writer

polemist and writer both are nouns.

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

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

polemist: a writer who argues in opposition to others (especially in theology)
writer: writes (books or stories or articles or the like) professionally (for pay)

Other hypernyms of polemist include author.

polemist (noun)	writer (noun)
a writer who argues in opposition to others (especially in theology)	writes (books or stories or articles or the like) professionally (for pay)
	a person who is able to write and has written something