sponson

noun

1. A projection from the side of an aircraft, watercraft, or land vehicle.

   “He and Gerald usually challenged the rollers in a sponson canoe when Gerald was there for the weekend; or, when Lansing came down, the two took long swims seaward or cruised about in Gerald's dory, clad in their swimming-suits ; and Selwyn's youth became renewed in a manner almost ridiculous,[…].”

verb

1. (often, transitive)To mount on a projection on the side of a vessel.

   “The belted cruiser Pamiat Azova or Remembrance of Azoff, is 377 feet long. She is an improved Dmitri Dontskoi, and carries her two 8-inch guns in sponsoned barbettes on either broadside”