Inferno vs infernal region

Inferno and infernal region both are nouns.

Word	Noun	Adjective	Verb	Adverb
Inferno	Yes	No	No	No
infernal region	Yes	No	No	No

As nouns, Inferno and infernal region are synonyms defined as:

Inferno and infernal region: (Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment

Other synonyms of Inferno include Hell, nether region, perdition, pit.

Inferno (noun)	infernal region (noun)
(Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment	(Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment
	(religion) the world of the dead