There are several synonyms for the term "peace talk" that can be used in various contexts. One alternative could be "peace negotiation," which implies that there is an active effort by two parties to resolve their differences and reach a compromise. "Conflict resolution" is another term that can be used, which focuses more on the process of finding a solution to a dispute rather than just initiating a dialogue. "Mediation," "conciliation," and "arbitration" are other synonyms that suggest the involvement of a third party to facilitate discussions and offer impartial guidance. Ultimately, the choice of a synonym depends on the specific situation and the tone or context of the message being communicated.