General Movement:
* Motion: This is the most general synonym, simply referring to a movement.
* Action: This word implies that the movement has a purpose or effect.
* Signal: This word emphasizes the communicative nature of the gesture.
* Sign: This word is similar to "signal" but can also refer to a non-verbal symbol.
* Movement: A more formal term for a physical motion.
Communicative Gesture:
* Signaling: This implies a deliberate communication with a gesture.
* Indicating: This implies a pointing out or highlighting something.
* Expressing: This emphasizes the emotional content of the gesture.
* Conveying: This focuses on the message being communicated by the gesture.
Courteous Gesture:
* Courtesy: This refers to a polite or respectful action.
* Consideration: This implies a thoughtful action done for someone else.
* Kindness: This emphasizes the goodwill behind the action.
* Politeness: This refers to a proper and respectful manner.
Other Options:
* Act: This is a general term for any action or deed.
* Deed: This implies a significant action.
* Demonstration: This implies a public showing of something.
The best synonym to use will depend on the specific context of the sentence.