* Συζήτηση (syzhítisí): This is probably the closest single word and is a very common and widely understood term for a discussion or conversation.
* Συμβούλιο (symbúlio): This refers more to a council or formal meeting, often involving discussion.
* Διαλέκτεια (dialékteia): This means "dialogue" or "conversation," often implying a more intellectual or philosophical exchange.
* Λόγος (lógos): While meaning "word" or "speech," λόγος can also refer to a reasoned argument or discourse, and thus be used in the context of a discussion.
The best choice would depend on the type of discussion. For a casual conversation, συζήτηση is ideal. For a formal meeting, συμβούλιο might be better. For an intellectual debate, διαλέκτεια is appropriate.