Synonyms of nightmare in English:

nightmare


See definition of nightmare

noun

1‘she had woken from a nightmare’

SYNONYMS
bad dream, night terrors
archaic incubus
rare ephialtes

2‘the long journey home was a nightmare’

SYNONYMS
ordeal, horror, torment, trial
burden, curse, bane, bogey, pet hate, dread, phobia
hell, purgatory, misery, agony, torture, murder
bête noire