commentator vs writer

commentator and writer both are nouns.

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

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

commentator: a writer who reports and analyzes events of the day
writer: writes (books or stories or articles or the like) professionally (for pay)

Other hypernyms of commentator include author.

commentator (noun)	writer (noun)
a writer who reports and analyzes events of the day	writes (books or stories or articles or the like) professionally (for pay)
an expert who observes and comments on something	a person who is able to write and has written something