ghost vs writer

ghost and writer both are nouns.

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

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

ghost: a writer who gives the credit of authorship to someone else
writer: writes (books or stories or articles or the like) professionally (for pay)

Other hypernyms of ghost include author.

ghost (noun)	writer (noun)
a mental representation of some haunting experience	writes (books or stories or articles or the like) professionally (for pay)
a suggestion of some quality	a person who is able to write and has written something
the visible disembodied soul of a dead person
a writer who gives the credit of authorship to someone else