Wiktionary
nether worlds
n. (nether world lang=en nodot=1) ((alternative spelling of netherworlds lang=en nocap=1 nodot=1)).
Usage examples of "nether worlds".
I imagine that even now our mysterious foe is enslaving more fiends from the nether worlds.
We are in the Underworld, the Nether Worlds, the regions of Upper Hell in the plane where demons reign!
Elric realised that this was no true supernatural denizen of the nether worlds, but a once-human creature warped by Theleb K’.
And when dealing with the nether worlds, distractions usually proved fatal.