Formal:
* Discussing: This implies a more serious and in-depth conversation.
* Debating: This suggests a more formal exchange of arguments and opinions.
* Examining: This indicates a thorough and analytical approach.
* Analyzing: This highlights the critical and detailed study of a topic.
* Exploring: This suggests a broader and less focused investigation.
* Addressing: This implies a direct focus on the topic and its issues.
* Presenting: This emphasizes the communication of information about the topic.
Informal:
* Chatting about: This implies a casual and friendly conversation.
* Talking about: This is a general term for any type of conversation.
* Discussing: This can also be used informally, but with a slightly more focused intent than "talking about."
* Bringing up: This implies that the topic was introduced into the conversation.
* Mentioning: This indicates a brief and casual reference to the topic.
* Talking over: This suggests a casual and informal discussion.
Other possibilities:
* Conversing
* Communicating
* Elaborating
* Expounding
* Explaining
* Dissecting
* Breaking down
The best word choice will depend on the specific context and the desired tone.