The GEBCO Sub-Committee on Undersea Feature Names (SCUFN), operated under IHO and IOC, maintains and makes available a digital gazetteer of the names and geographic position of features on the sea floor. Their recently launched digital gazetteer is now linked with Marine Regions using OGC webservices. You can consult the georeferenced undersea features by selecting Sources: 'IHO-IOC GEBCO Gazetteer of Undersea Feature Names'. Marine Regions is providing both accepted, synonym and previously accepted terms.