hydrofoil

(noun) a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through. Synonyms: foil. Example: "The fins of a fish act as hydrofoils."

(noun) a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds. Synonyms: hydroplane. Example: "The museum houses a replica of the jet hydroplane that broke the record."