What is another word for groyne?
Pronunciation: [ɡɹˈɔ͡ɪn] (IPA) 
Groyne, a word that refers to a structure built perpendicular to the shoreline to trap sediment and prevent beach erosion, has several synonyms. The most common synonym for groyne is jetty, which is a similar structure, but built to protect harbors. Another synonym is breakwater, which is usually built parallel to the shore and helps break waves before they reach the coastline. Other synonyms for groyne include groin, mole, and seawall. Groin is often used interchangeably with groyne, while mole refers to a long, narrow structure that extends out into the sea. Seawall is a more substantial structure designed to protect the coast from waves and tides, but also has the potential to cause erosion.
