styx

• POS: Noun

CIDE DICTIONARY

styx, n. [L., fr. Gr. .].

 The principal river of the lower world, which had to be crossed in passing to the regions of the dead.  [1913 Webster]

ROGET THESAURUS

styx

Hell

N hell, bottomless pit, place of torment, habitation of fallen angels, Pandemonium, Abaddon, Domdaniel, jahannan, sheol, hell fire, everlasting fire, everlasting torment, eternal damnation, lake of fire and brimstone, fire that is never quenched, worm that never dies, purgatory, limbo, gehenna, abyss, Tartarus, Hades, Avernus, Styx, Stygian creek, pit of Acheron, Cocytus, infernal regions, inferno, shades below, realms of Pluto, Pluto, Rhadamanthus, Erebus, Tophet, hellish, infernal, stygian, dies irae dies illa, the hue of dungeons and the scowl of night.