proposition vs ghost

proposition and ghost both are nouns.

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

As nouns, ghost is a hyponym of proposition; that is, ghost is a word with a more specific, narrower meaning than proposition:

Other hyponyms of proposition include breath, hint, intimation, touch, trace, advance, approach, feeler, overture.

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