nightmares
noun
Definitions
A demon or monster, thought to plague people while they slept and cause a feeling of suffocation and terror during sleep.
Sleep paralysis.
A very bad or frightening dream.
Example: I had a nightmare that I tried to run but could neither move nor breathe.
Any bad, miserable, difficult or terrifying situation or experience that arouses anxiety, terror, agony or great displeasure.
Example: Cleaning up after identity theft can be a nightmare of phone calls and letters.