Party line can be replaced with a variety of synonyms, depending on the specific context in which it is being used. Some options include: phone line, communication channel, network, public service, political affiliation, ideology, and association. In the telecommunication industry, a party line is a shared phone line that several users can access. In politics, a party line refers to the official position of a political party on a particular issue or legislation. In general conversation, a party line can refer to a group's collective opinion or viewpoint on a topic. Regardless of its context, there are various phrases and synonyms available to replace the phrase "party line".