"Sponson" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) Yes
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) Yes

"sponson" Definition

  1. a projection (such as a gun platform) from the side of a ship or a tank
  2. an air chamber along a watercraft (such as a canoe) to increase stability and buoyancy
  3. a light air-filled structure or a winglike part protruding from the hull of a seaplane to steady it on water

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