Inferno vs fictitious place

Inferno and fictitious place both are nouns.

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

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

Inferno: (Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment
fictitious place: a place that exists only in imagination; a place said to exist in fictional or religious writings

Other hypernyms of Inferno include imaginary place, mythical place.

Inferno (noun)	fictitious place (noun)
(Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment	a place that exists only in imagination; a place said to exist in fictional or religious writings