infernal region vs Inferno

infernal region and Inferno both are nouns.

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

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

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

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

infernal region (noun)	Inferno (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