Furious vs Mad as hell

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

Furious

Top 2,000 (common)B2adjective

Mad as hell

InformalTop 5,000 (fairly common)
Most formal: FuriousMost common: Furious
 FuriousMad as hell
Pronunciation🇬🇧 /["/ˈfjʊəriəs/"]/🇺🇸 /["/ˈfjʊriəs/"]/🇬🇧 //mæd əz hɛl//🇺🇸 //mæd əz hɛl//
MeaningVery angry.Very angry.
ExampleShe was furious when she found out someone had scratched her car.When I found out he lied to me, I was mad as hell.
RegisterNeutralInformal
How commonTop 2,000 (common)Top 5,000 (fairly common)
CEFR levelB2-
Part of speechadjective
Collocationsbe, feel, look, absolutely, still, reportedly, about, at, overmad as a hatter, mad as a hornet, mad as a March hare
Antonymscalm, peaceful, tranquil-
Common mistakesConfused with 'fury' which is a noun., Overused in contexts where 'angry' or 'mad' would suffice., Sometimes spelled incorrectly as 'furous'.Misunderstanding the intensity of the phrase; it's stronger than just 'angry'., Using in formal writing where it seems out of place., Confusing it with lighter expressions of displeasure.
Usage notesUse 'furious' to describe someone who is extremely angry, often in everyday conversation or writing. It would be less appropriate in formal writing or when describing mild irritation.Used to express intense anger. More appropriate in casual conversations. Avoid in formal settings.

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Furious
Mad as hell

Frequently asked questions: Furious vs Mad as hell

What's the difference between Furious and Mad as hell?

Furious: Very angry. Mad as hell: Very angry.

Which is more formal: Furious and Mad as hell?

Furious is the most formal of these.

Which is more common: Furious and Mad as hell?

Furious is the most common in everyday English.

Can you show an example of each?

Furious: She was furious when she found out someone had scratched her car. Mad as hell: When I found out he lied to me, I was mad as hell.

Can I use Furious and Mad as hell interchangeably?

Not always. Furious and Mad as hell 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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