There aren't many synonyms for the specific term "hermaphrodite brig," as it refers to a type of sailing vessel with a distinct combination of characteristics. However, there are some related terms that may be useful in describing this type of ship. "Brigantine" is a type of sailing vessel that is similar to a brig, but has square-rigged sails on the foremast and fore-and-aft sails on the mainmast. "Hermaphrodite" can also refer to a type of sail, often used on smaller vessels, that combines elements of a square sail and a fore-and-aft sail. Other terms that may be related to hermaphrodite brigs include "coasting brig" or "trading brig," which were common types of cargo ships in the 18th and 19th centuries.