Related Clues:

• Thin flat slabs, for roofing perhaps
• About fifty knots underfoot
• Headgear to go wild on?
• Bath flooring pieces, perhaps
• Kitchen flooring, perhaps
• Mosaic material
• Mah-jongg draws
• Scrabble's blank pair
• Scrabble squares
• 'Scrabble' supply
• Roofing slabs
• Word-game pieces
• Bathroom floor pieces, often
• Slabs of clay
• Roofing materials