Synonyms for Hades (same or very similar meaning)
WordNet sense 1 ((Greek mythology) the god of the underworld in ancient mythology; brother of Zeus and husband of Persephone):
Aides, Aidoneus, PlutoWordNet sense 2 ((religion) the world of the dead):
hell, netherworld, underworld, Hel, Scheol, infernal regionFrom the ODE community, based on WordNetadd/edit