ghost vs proposition

ghost and proposition both are nouns.

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

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

Other hypernyms of ghost include proffer, suggestion.

ghost (noun)	proposition (noun)
a mental representation of some haunting experience	a task to be dealt with
a suggestion of some quality	(logic) a statement that affirms or denies something and is either true or false
the visible disembodied soul of a dead person	a proposal offered for acceptance or rejection
a writer who gives the credit of authorship to someone else	the act of making a proposal
	an offer for a private bargain (especially a request for sexual favors)