Lubber's point is an old nautical term that refers to a point on a ship's compass that is inaccurate due to the vessel's movement or magnetic interference. There are various synonyms for the word lubber's point that serve as alternatives to the term. These include phantom point, false heading, erroneous course, and compass deviation. Sailors often use these substitutes to communicate the same concept in different ways. Lubber's point and its synonyms provide an important language for seafarers who navigate through the open sea and deal with unexpected difficulties in their voyages.