A moderator is a person who facilitates discussion and helps to ensure that conversations remain civil and productive. A DIPLOMAT is someone who acts as an official representative of their country in foreign relations. An ARBITER is a person who makes a decision or judgement in a dispute. A MEDIATOR is someone who attempts to bring two sides together to reach a compromise. A NEGOTIATOR is someone who works to reach an agreement between two parties. A HOST is someone who welcomes guests and ensures that they are comfortable. A CHAIR is someone who presides over a meeting or discussion. A CHAIRMAN is someone who is the leader of a committee or organization. All of these terms can be used to describe a moderator, who is responsible for ensuring that conversations remain civil and productive.