Related Clues:

• Level
• Wedge-shaped insert
• Thin wedge of wood
• Wedge of wood
• Gap-filling wedge
• Leveling wedge
• Mason's wedge
• Machine wedge
• Water whirl
• Thin strip of wood
• Doorstop, perhaps
• Doorstop, often
• Wooden gap-filler
• Wedge, of a sort
• Table leveler