A guard post is a term used to describe a place where sentries or guards are stationed to protect a location or an entrance. Synonyms for guard post include lookout, watchtower, security checkpoint, checkpoint, observation post, sentry post, guard tower, and security post. Each of these synonyms has a slightly different connotation and use, but they all convey the same meaning of a place where guards are positioned to protect a given location. Choosing the right synonym will depend on the specific context and setting of the guard post, as well as the intended tone and style of the communication.