Hades vs infernal region

Hades and infernal region both are nouns.

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

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

Other synonyms of Hades include Hell, netherworld, Scheol, underworld.

Hades (noun)	infernal region (noun)
(religion) the world of the dead	(Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment
(Greek mythology) the god of the underworld in ancient mythology; brother of Zeus and husband of Persephone	(religion) the world of the dead