Berserk vs Crazy vs Mad

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

Berserk

Beyond 10,000 (less common)

Crazy

InformalTop 1,000 (very common)A2adjective

Mad

InformalTop 2,000 (common)B1adjective
Most formal: BerserkMost common: Crazy
 BerserkCrazyMad
Pronunciation🇬🇧 //bɜːˈzɜːk//🇺🇸 //bɜrˈzɜrk//🇬🇧 /["/ˈkreɪzi/"]/🇺🇸 /["/ˈkreɪzi/"]/🇬🇧 /["/mæd/"]/🇺🇸 /["/mæd/"]/
MeaningVery angry or out of control.Very strange or unusual; not normal.angry or upset
ExampleAfter hearing the news, he went completely berserk.She has a crazy idea about how to solve the problem.I was so mad when I found out someone had used my laptop without asking.
RegisterNeutralInformalInformal
How commonBeyond 10,000 (less common)Top 1,000 (very common)Top 2,000 (common)
CEFR level-A2B1
Part of speechadjectiveadjective
Collocationsgo berserk, berserk with anger, behave berserkbe, seem, sound, really, absolutely, completely, with, be, go, drive somebody, absolutely, completely, at, be, seem, sound, really, absolutely, completely, withbe, look, seem, absolutely, completely, quite, with, be, look, seem, absolutely, completely, quite, with, be, feel, look, extremely, fairly, very, at, with
Antonymscalm, sanecalm, sane, normalhappy, calm, pleased
Common mistakesConfused with 'berserk' as just a physical state without emotional context., Used as a noun instead of an adjective.'Crazy' should not be used to describe mental health issues as it's considered insensitive., Learners often confuse 'crazy' with 'wild' when they mean 'uncontrolled'., Sometimes used as a noun ('the crazy'), which is incorrect.Using 'mad' in formal writing., Mixing up 'mad' with 'crazy'—they have different meanings., Saying 'mad of' instead of 'mad at'.
Usage notesUsed to describe someone behaving wildly or extremely. Typically informal, but can be neutral in literary contexts.Used in informal contexts to describe something that is surprising, wild, or insane. Avoid in formal writings or professional settings.It's commonly used in casual conversations to express anger. Avoid using it in formal situations, as it may be seen as childish.

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Berserk

Frequently asked questions: Berserk vs Crazy vs Mad

What's the difference between Berserk, Crazy, and Mad?

Berserk: Very angry or out of control. Crazy: Very strange or unusual; not normal. Mad: angry or upset

Which is more formal: Berserk, Crazy, and Mad?

Berserk is the most formal of these.

Which is more common: Berserk, Crazy, and Mad?

Crazy is the most common in everyday English.

Which is more advanced: Berserk, Crazy, and Mad?

Mad is the highest level, at B1, on the CEFR scale.

Can you show an example of each?

Berserk: After hearing the news, he went completely berserk. Crazy: She has a crazy idea about how to solve the problem. Mad: I was so mad when I found out someone had used my laptop without asking.

Can I use Berserk, Crazy, and Mad interchangeably?

Not always. Berserk, Crazy, and Mad 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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