purgatory (n.)
- asceticism
- bog
- cage
- coop
- cruciation
- crucifixion
- enclosure
- fasting
- fen
- flagellation
- hell
- holocaust
- horror
- inferno
- laceration
- limbo
- lustration
- maceration
- marsh
- martyrdom
- mire
- morass
- mortification
- nightmare
- passion
- pen
- penance
- penitence
- perdition
- persecution
- pinfold
- pound
- purgation
- quag
- quagmire
- rack
- repentance
- slough
- sump
- torment
- torture
- underworld