night·mare
ˈnītˌmer/
noun
a frightening or unpleasant dream.
"I had nightmares after watching the horror movie"
synonyms:bad dream, night terrors;
"she woke from a nightmare"
a terrifying or very unpleasant experience or prospect.
"the nightmare of racial hatred"
synonyms:ordeal, trial, torment, horror, hell, misery, agony, torture, murder; More
a person, thing, or situation that is very difficult to deal with.
"buying wine can be a nightmare if you don't know enough about it"
synonyms:ordeal, trial, torment, horror, hell, misery, agony, torture, murder; More