Horror vs Nightmare

When to use each in English, with meaning, register, and examples.

Horror

Top 2,000 (common)B1noun

Nightmare

Top 2,000 (common)B2noun
 HorrorNightmare
Pronunciation🇬🇧 /["/ˈhɒrə(r)/"]/🇺🇸 /["/ˈhɔːrər/"]/🇬🇧 /["/ˈnaɪtmeə(r)/"]/🇺🇸 /["/ˈnaɪtmer/"]/
MeaningA type of story that is meant to scare or frighten people.A very bad dream that makes you feel scared or worried.
ExampleThe horror movie was so terrifying that I couldn't sleep afterwards.After watching that horror movie, I had a nightmare about being chased by monsters.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB1B2
Part of speechnounnoun
Collocationsabject, absolute, pure, feel, have, fill somebody with, film, movie, story, in horror, to your horror, with horror, a look of horror, full, real, true, commit, inflict, perpetrate, full, real, true, commit, inflict, perpetrate, abject, absolute, pure, feel, have, fill somebody with, film, movie, story, in horror, to your horror, with horror, a look of horrorawful, horrible, terrible, have, suffer, suffer from, haunt somebody, plague somebody, nightmare about, awful, horrible, real, endure, face, live, be over, come true, scenario, vision, world
Antonymsjoy, happiness, delightdream, wonder
Common mistakesConfused with 'terror' - 'horror' refers to the genre, while 'terror' is an intense feeling., Mispronounce it as 'hore-er' instead of 'hor-er'., Using 'horror' to describe something bad or unpleasant outside of the scary context.Confusing nightmare with daydream., Using nightmare in place of dream without context., Mispronouncing it as 'night-mayer'.
Usage notesUsed to describe movies, books, or experiences that are scary. Avoid using in casual contexts where lighter genres are discussed, like comedy.Use 'nightmare' to describe scary dreams or difficult experiences. It is usually neutral but can be used informally. Avoid using it in formal contexts.

Frequently asked questions: Horror vs Nightmare

What's the difference between Horror and Nightmare?

Horror: A type of story that is meant to scare or frighten people. Nightmare: A very bad dream that makes you feel scared or worried.

Are Horror and Nightmare the same CEFR level?

Horror: B1, Nightmare: B2 on the CEFR scale.

Can I use Horror and Nightmare interchangeably?

Not always. Horror and Nightmare are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons