Thesaurus

nightmare

noun

Synonyms & Antonyms of nightmare

(Entry 1 of 2)

a situation or state that causes great suffering and unhappiness
  • that 20-page exam was a nightmare

Synonyms for nightmare

Words Related to nightmare

Near Antonyms for nightmare

Antonyms for nightmare

nightmare

adjective

Synonyms & Antonyms of nightmare (Entry 2 of 2)

See the Dictionary Definition 

Keep scrolling for more

Learn More About nightmare

Time Traveler for nightmare

Time Traveler

The first known use of nightmare was in the 14th century

See more words from the same century

Listen to Our Podcast About nightmare

Thesaurus Entries Near nightmare

nightly

nightmare

nightmares

See More Nearby Entries 

Cite this Entry

“Nightmare.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nightmare. Accessed 18 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on nightmare

Nglish: Translation of nightmare for Spanish Speakers

Britannica English: Translation of nightmare for Arabic Speakers

Britannica.com: Encyclopedia article about nightmare

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!