Word Type

Noun

Verb

The word "nightmare" can be used as noun and verb.

Word Relationships

Derived Terms

daymare flightmare frightmare knightmare logistical nightmare mid-nightmare midnightmare morningmare nightmare disorder nightmare fuel nightmarelike nightmarious nightmarish nightmary out of a nightmare

Derived From

mare

Broader Terms (Hypernyms)

dream dreaming situation

Type Of (IsA)

bad dream dream frightening dream scary dream situation

Related Terms

night terror sleep paralysis

Related Terms

agony anxiety bad daymare demon difficult displeasure dream frightening miserable nightmarish plague suffocation terrify terror

Synonym Network

incubus night terror

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.