afterworld vs fictitious place

afterworld and fictitious place both are nouns.

Word	Noun	Adjective	Verb	Adverb
afterworld	Yes	No	No	No
fictitious place	Yes	No	No	No

As nouns, fictitious place is a hypernym of afterworld; that is, fictitious place is a word with a broader meaning than afterworld:

afterworld: the place where you are after you die
fictitious place: a place that exists only in imagination; a place said to exist in fictional or religious writings

Other hypernyms of afterworld include imaginary place, mythical place.

afterworld (noun)	fictitious place (noun)
the place where you are after you die	a place that exists only in imagination; a place said to exist in fictional or religious writings