Lexical entrainment
In conversational linguistics, lexical entrainment is the phenomenon by which a speaker adopts the referential terms used by their interlocutor. It acts as a mechanism of the cooperative principle in which both parties to the conversation employ lexical entrainment as a progressive system to develop "conceptual pacts" (a working temporary conversational terminology) to ensure maximum clarity of reference in the communication between the parties; this process is necessary to overcome the ambiguity inherent in the multitude of synonyms that exist in language.