bottomless pit (?.)

• Abaddon
• Gehenna
• Hades
• Naraka
• Pandemonium
• Sheol
• Tophet
• avichi
• bowels
• deep space
• deeps
• depths
• gaping depths
• hell
• infernal pit
• infernal regions
• inferno
• jahannan
• limbo
• lower world
• nether world
• outer space
• perdition
• place of torment
• purgatory
• shades below
• the abyss
• the bottomless pit
• the grave
• the pit
• underworld
• unfathomed deeps
• unknown depths