nightmare 1 of 2

noun

ˈnīt-ˌmer How to pronounce nightmare (audio)
Definition of nightmarenext
as in agony
a situation or state that causes great suffering and unhappiness that 20-page exam was a nightmare

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

nightmare

2 of 2

adjective

as in horrific
extremely disturbing or repellent survivors of a nuclear holocaust would surely face a nightmare existence

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of nightmare
Noun
Edited for maximum media effect, broadcast on a 24-hour loop and presented as breaking news, this scenario portends a company’s biggest nightmare. — Adonis Hoffman, Washington Post, 5 Nov. 2026 Trump was trounced, the country triumphed, and the long national nightmare is over, but for the rest of his lame-duck presidency. — Steve Lopez, Los Angeles Times, 4 Nov. 2026
Adjective
This is the nightmare scenario behind the Kessler syndrome, a cascading chain of collisions that could render entire orbital pathways unusable. — Alan Bradley, Space.com, 2 Aug. 2026 But the 22-year-old is not alone in having a nightmare individual performance on a high-profile sporting stage. — Eduardo Tansley, New York Times, 12 Mar. 2026 See All Example Sentences for nightmare
Recent Examples of Synonyms for nightmare
  1. agony
  2. horrific
  3. misery
  4. gruesome
  5. horror
  6. shocking
  7. torture
  8. horrible
Noun
  • Taking the McDavid minutes away gives us the purest form of agony these defencemen are experiencing at this time.
    — Allan Mitchell, New York Times, 28 Oct. 2026
  • The prisoner in question, Doug Korpi, had also admitted that his agony was an act to journalist Ben Blum, who included the revelation in a broader takedown of the experiment published in 2018.
    — Jacopo Prisco, CNN Money, 21 Oct. 2026
Definition of agony
Adjective
  • First, Biden’s open borders let this monster into our country, then sanctuary politicians in New York refused to hand him over to ICE and released him after a previous arrest three months before this horrific crime.
    — Kelsie Cairns, FOXNews.com, 3 Nov. 2026
  • Travis Barker has an unfortunate connection to the horrific plane crash in Greenacres, Florida, on Sunday that killed all nine people on board — two crew and seven passengers.
    — Madeleine Marr, Miami Herald, 3 Nov. 2026
Definition of horrific
Noun
  • Would Villeneuve put us all out of our misery and spill the beans?
    — Rebecca Ford, Vanity Fair, 8 Nov. 2026
  • Heavy rains lashed the Gaza Strip, flooding tents and intensifying the misery of hundreds of thousands of Palestinians.
    — ABC News, ABC News, 7 Nov. 2026
Definition of misery
Adjective
  • Thunder star Jalen Williams, the team’s second-leading scorer and best all-around defender during its title run two seasons ago, fractured a fibula and dislocated his left ankle in a gruesome injury Sunday.
    — Andrew Greif, NBC news, 29 Oct. 2026
  • Rescue workers continue to search in the wreckage for survivors and bodies, with witnesses describing a gruesome scene.
    — Anders Hagstrom, FOXNews.com, 28 Oct. 2026
Definition of gruesome
Noun
  • After a horror-heavy October, studios are rolling out their awards bait.
    — David Faris, TheWeek, 4 Nov. 2026
  • Daisy Ridley, Sosie Bacon and Simon Rex are set to star in Get Rid of It, a horror project that Ry Russo-Young will direct from a script by Gemma Holdway.
    — Scott Roxborough, HollywoodReporter, 4 Nov. 2026
Definition of horror
Adjective
  • Democrats notched several shocking flips in seats President Donald won by double digits in 2024, meaning those districts will be some of the toughest to defend in a more even election cycle.
    — Lauren Green, The Washington Examiner, 6 Nov. 2026
  • Democrats felt optimistic about taking the majority earlier in the night than some had expected after the shocking win in South Carolina.
    — Burgess Everett, semafor.com, 4 Nov. 2026
Definition of shocking
Noun
  • The practice has received more scrutiny in recent weeks, after Tennessee prisoner Christa Pike, 50, survived a botched execution for her role in the 1995 torture and murder of a classmate, Colleen Slemmer.
    — Lia Russell, Sacbee.com, 2 Nov. 2026
  • Thompson was convicted of the brutal 1976 torture and murder of 23-year-old Sally Ivester in North Miami Beach.
    — Grethel Aguila, Miami Herald, 30 Oct. 2026
Definition of torture
Adjective
  • Their monthlong travel by ship was under horrible conditions.
    — Lois K. Solomon, Sun Sentinel, 2 Nov. 2026
  • While the fire was horrible, Hong said some blessings have emerged from the tragedy.
    — Angie Leventis Lourgos, Chicago Tribune, 1 Nov. 2026
Definition of horrible

Browse Nearby Words

nightly
nightmare
nightmares
See all Nearby Words

Podcast

Theme music by Joshua Stamper ©2006 New Jerusalem Music/ASCAP

Cite this Entry

“Nightmare.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nightmare. Accessed 11 Nov. 2026.

Copy Citation

More from Merriam-Webster on nightmare

Britannica.com: Encyclopedia article about nightmare

Love words? Need even more definitions?

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

Last Updated: - Updated example sentences

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of valorous

See Definitions and Examples »

Popular in Grammar & Usage

See More

How to Use 'Who' vs. 'Whom'

31 Useful Rhetorical Devices

More Commonly Misspelled Words

Merriam-Webster’s Great Big List of Words You Love to Hate

'Affect' vs. 'Effect'
See More

Popular in Wordplay

See More

Great Big List of Beautiful and Useless Words, Vol. 5

9 Words That Sound Like Insults But Aren't

The Longest Long Words List

Even More Bird Names that Sound Like Insults (and Sometimes Are)

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

How to Use 'Who' vs. 'Whom'

Great Big List of Beautiful and Useless Words, Vol. 5

9 Words That Sound Like Insults But Aren't
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
woman sitting on floor holding book in front of her face on pink background
Famous Novels, Last Lines Quiz Needless to say, spoiler alert.
See All