Thesaurus

nightmarish

adjective

Synonyms & Antonyms of nightmarish

See the Dictionary Definition 

Learn More About nightmarish

Thesaurus Entries Near nightmarish

nightmares

nightmarish

night owl

See More Nearby Entries 

Cite this Entry

“Nightmarish.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nightmarish. Accessed 24 Sep. 2022.

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

More from Merriam-Webster on nightmarish

Nglish: Translation of nightmarish for Spanish Speakers

Test Your Vocabulary

Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

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!