Inferno vs imaginary place

Inferno and imaginary place both are nouns.

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

As nouns, imaginary place is a hypernym of Inferno; that is, imaginary 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
imaginary place: a place that exists only in imagination; a place said to exist in fictional or religious writings

Other hypernyms of Inferno include fictitious place, mythical place.

Inferno (noun)	imaginary 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