Behaviour vs Conduct

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

Behaviour

Top 2,000 (common)A2noun

Conduct

Top 2,000 (common)B2verb
 BehaviourConduct
Pronunciation🇬🇧 /["/bɪˈheɪvjə(r)/"]/🇺🇸 /["/bɪˈheɪvjər/"]/🇬🇧 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/🇺🇸 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/
MeaningThe way someone acts or behaves.To lead or manage something, like a project or an activity.
ExampleHer behaviour at the party was quite friendly and welcoming.The scientist will conduct an experiment to test the hypothesis.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelA2B2
Part of speechnounverb
Collocationsexemplary, good, acceptable, affect, control, influence, pattern, modification, issues, behaviour towards/​toward, behaviour and attitudes, be on your best behaviour, a code of behaviour, exemplary, good, acceptable, affect, control, influence, pattern, modification, issues, behaviour towards/​toward, behaviour and attitudes, be on your best behaviour, a code of behaviourindependently, separately, jointly, honourably/​honorably, well, with dignity, as, in, well
Antonymsmisbehavior, disobedienceneglect, abandon
Common mistakesConfused with 'behavior' vs 'behaviour' (UK vs US spelling)., Using it as a verb; it's only a noun., Mixing it up with 'conduct' when the context doesn't fit.Confused 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 in both formal and informal contexts. In formal settings, you might discuss 'behavior' in psychology or education. Avoid using in casual conversations where simpler terms like 'acting' may fit better.Use ‘conduct’ in formal contexts, such as business or research. It is not suitable for casual conversations or informal writing.

Frequently asked questions: Behaviour vs Conduct

What's the difference between Behaviour and Conduct?

Behaviour: The way someone acts or behaves. Conduct: To lead or manage something, like a project or an activity.

Which is more advanced: Behaviour and Conduct?

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

Are Behaviour and Conduct the same CEFR level?

Behaviour: A2, Conduct: B2 on the CEFR scale.

What part of speech are Behaviour and Conduct?

Behaviour: noun, Conduct: verb.

Can you show an example of each?

Behaviour: Her behaviour at the party was quite friendly and welcoming. Conduct: The scientist will conduct an experiment to test the hypothesis.

Can I use Behaviour and Conduct interchangeably?

Not always. Behaviour 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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