Act vs Conduct

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

Act

Top 1,000 (very common)A2verb

Conduct

Top 2,000 (common)B2verb
Most common: Act
 ActConduct
Pronunciation🇬🇧 /["/ækt/","/ækts/","/ˈæktɪd/","/ˈæktɪŋ/"]/🇺🇸 /["/ækt/","/ækts/","/ˈæktɪd/","/ˈæktɪŋ/"]/🇬🇧 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/🇺🇸 /["/kənˈdʌkt/","/kənˈdʌkts/","/kənˈdʌktɪd/","/kənˈdʌktɪŋ/"]/
MeaningTo do something or take action.To lead or manage something, like a project or an activity.
ExampleShe decided to act in the school play this year.The scientist will conduct an experiment to test the hypothesis.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA2B2
Part of speechverbverb
Collocationsat once, immediately, promptly, against, for somebody, on behalf of somebody, act as if, act in somebody’s best interests, act in good faith, at once, immediately, promptly, against, for somebody, on behalf of somebody, act as if, act in somebody’s best interests, act in good faith, brilliantly, well, badly, brilliantly, well, badlyindependently, separately, jointly, honourably/​honorably, well, with dignity, as, in, well
Antonymsignore, neglect, refrainneglect, abandon
Common mistakes'Act' is sometimes confused with 'take action', which has a slightly different connotation., Learners often omit the preposition when using 'act on' phrases., 'Act' may be incorrectly used as a noun instead of a verb.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 notesUse 'act' in both formal and informal contexts when referring to behavior. Avoid using it in overly casual settings when describing serious actions.Use ‘conduct’ in formal contexts, such as business or research. It is not suitable for casual conversations or informal writing.

Frequently asked questions: Act vs Conduct

What's the difference between Act and Conduct?

Act: To do something or take action. Conduct: To lead or manage something, like a project or an activity.

Which is more common: Act and Conduct?

Act is the most common in everyday English.

Are Act and Conduct the same CEFR level?

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

Can I use Act and Conduct interchangeably?

Not always. Act 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.

Related comparisons