CENTERBOARDS
Scrabble letter values: C3E1N1T1E1R1B3O1A1R1D2S1 = 17
Definition
CENTERBOARDS is the plural of CENTERBOARD.
noun CENTERBOARD: a retractable fin keel used on sailboats to prevent drifting to leeward.
Synonyms of CENTERBOARD: centreboard, drop_keel, sliding_keel