Nightmare vs Terror

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

Nightmare

Top 2,000 (common)B2noun

Terror

FormalTop 2,000 (common)B2noun
Most formal: Terror
 NightmareTerror
Pronunciation🇬🇧 /["/ˈnaɪtmeə(r)/"]/🇺🇸 /["/ˈnaɪtmer/"]/🇬🇧 /["/ˈterə(r)/"]/🇺🇸 /["/ˈterər/"]/
MeaningA very bad dream that makes you feel scared or worried.Great fear or panic.
ExampleAfter watching that horror movie, I had a nightmare about being chased by monsters.The city was gripped by terror after the unexpected attack.
RegisterNeutralFormal
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2B2
Part of speechnounnoun
Collocationsawful, horrible, terrible, have, suffer, suffer from, haunt somebody, plague somebody, nightmare about, awful, horrible, real, endure, face, live, be over, come true, scenario, vision, worldabject, absolute, pure, be filled with, feel, have, from terror, in terror, out of terror, a state of terror, strike terror into (the heart of) somebody, political, state, global, resort to, use, combat, campaign, war, plot, an act of terror, a campaign of terror, a reign of terror
Antonymsdream, wondercalm, peace, tranquility
Common mistakesConfusing nightmare with daydream., Using nightmare in place of dream without context., Mispronouncing it as 'night-mayer'.Confused with 'terrorize' (verb form)., Using in casual contexts where 'fear' would be better., Mispronouncing, especially the first syllable.
Usage notesUse 'nightmare' to describe scary dreams or difficult experiences. It is usually neutral but can be used informally. Avoid using it in formal contexts.Often used in serious contexts, such as discussing violence or fear. Less appropriate in light-hearted conversations.

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Nightmare

Frequently asked questions: Nightmare vs Terror

What's the difference between Nightmare and Terror?

Nightmare: A very bad dream that makes you feel scared or worried. Terror: Great fear or panic.

Which is more formal: Nightmare and Terror?

Terror is the most formal of these.

Are Nightmare and Terror the same CEFR level?

Nightmare: B2, Terror: B2 on the CEFR scale.

What part of speech are Nightmare and Terror?

Nightmare: noun, Terror: noun.

Can you show an example of each?

Nightmare: After watching that horror movie, I had a nightmare about being chased by monsters. Terror: The city was gripped by terror after the unexpected attack.

Can I use Nightmare and Terror interchangeably?

Not always. Nightmare and Terror 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.

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