1) French word used in English 2) Hell 3) Hell or ruin 4) Imaginary place 5) Infernal region 6) Inferno 7) Low ground 8) Mythical place 9) Nether region 10) Play by Jim Allen 11) The pit Found on https://www.crosswordclues.com/clue/perdition
• (n.) Entire loss; utter destruction; ruin; esp., the utter loss of the soul, or of final happiness in a future state; future misery or eternal death. • (n.) Loss of diminution. Found on http://thinkexist.com/dictionary/meaning/perdition/
Per·di'tion noun [ French, from Latin perditio , from perdere , perditum , to ruin, to lose; per (cf. Sanskrit parā away) + -dere (only in comp.) to put; akin to Greek ..., English do . See Do .] 1. Entire loss; utter destructi... Found on http://www.encyclo.co.uk/webster/P/52