Behavior vs Conduct

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

Behavior

Top 1,000 (very common)B1

Conduct

Top 2,000 (common)B2verb
Most common: Behavior
 BehaviorConduct
Pronunciation🇬🇧 //bɪˈheɪvjər//🇺🇸 //bɪˈheɪvjɚ//🇬🇧 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/🇺🇸 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/
MeaningThe way a person or animal acts.To lead or manage something, like a project or an activity.
ExampleHer behavior during the meeting was very professional.The scientist will conduct an experiment to test the hypothesis.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelB1B2
Part of speechverb
Collocationsacceptable behavior, strange behavior, modifying behavior, social behavior, behavior patternindependently, separately, jointly, honourably/​honorably, well, with dignity, as, in, well
Antonymsmisconduct, bad behaviorneglect, abandon
Common mistakesConfused with 'behaviour' (British spelling), Using it as a verb instead of a noun, Mixing up with 'conduct' or 'deportment' without clear contextConfused with 'conduct' as a noun vs. verb., Incorrectly using it without an object, e.g., 'conduct a meeting' instead of just 'conduct'., Mixing up 'conduct' with similar verbs like 'perform' or 'carry out'.
Usage notesUsed to describe actions or conduct, often in psychological or social contexts. Avoid in very informal speech.Use ‘conduct’ in formal contexts, such as business or research. It is not suitable for casual conversations or informal writing.

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Behavior

Frequently asked questions: Behavior vs Conduct

What's the difference between Behavior and Conduct?

Behavior: The way a person or animal acts. Conduct: To lead or manage something, like a project or an activity.

Which is more common: Behavior and Conduct?

Behavior is the most common in everyday English.

Which is more advanced: Behavior and Conduct?

Conduct is the highest level, at B2, on the CEFR scale.

Are Behavior and Conduct the same CEFR level?

Behavior: B1, Conduct: B2 on the CEFR scale.

Can you show an example of each?

Behavior: Her behavior during the meeting was very professional. Conduct: The scientist will conduct an experiment to test the hypothesis.

Can I use Behavior and Conduct interchangeably?

Not always. Behavior and Conduct 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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