For acting in a play or movie:
* jouer (to play) - This is the most common word for acting.
* interpréter (to interpret) - This implies a deeper understanding of the role.
For an action or deed:
* acte (act, deed) - This refers to a specific action or event.
* agir (to act, to behave) - This refers to a general action or behavior.
For a law or regulation:
* loi (law) - This refers to a formal legal document.
* règlement (regulation) - This refers to a rule or guideline.
For a part of a play or a story:
* acte (act) - This refers to a division of a play or story.
The best way to choose the right word is to consider the context and the specific meaning you want to convey.