* Utterance: This refers to a single instance of speaking.
* Speech: This is a broader term for the act of speaking or the ability to speak.
* Words: These are the individual units of spoken language.
* Dialogue: This refers to a conversation between two or more people.
* Discourse: This is a more formal term for a conversation or a written text.
The best noun to use will depend on what you want to emphasize.
For example:
* "The student's utterance was barely audible."
* "The professor gave a fascinating speech on the history of language."
* "They exchanged a few words before parting ways."
* "The play's dialogue was witty and engaging."
* "The political discourse on climate change is often heated."