There are several synonyms that can be used in place of the term "telephone conversation." Some popular options include "phone call," "telephonic discussion," "phone chat," and "dialogue over the phone." Other possibilities include "voice communication," "telephoning," and "talking on the phone." Depending on the context of the conversation, different synonyms may be more appropriate. For example, "phone call" may be the most common and straightforward option, while "telephonic discussion" may be used in more formal or professional settings. Regardless of which synonym is used, the meaning remains the same: a conversation or discussion taking place via telephone.