klinker or clinker /klingˈkər/

A very hard paving-brick

clinker¹ /klingˈkər/

1. The incombustible residue of fused ash raked out of furnaces
2. Furnace slag
3. The cindery crust of some lava flows
4. A hard brick (also klinkˈer)

clinkˈer-block noun

A block for building made from ash from furnaces

• play around
• playas
• play at
• play at waster
• play at wasters
• play a waiting game
• play back
• playback
• playbacks
• play ball
• playbill
• playbills
• playbook
• playbooks
• play booty
• play-box
• play-boxes
• playboy
• playboys
• Playbuses
• Playbusses
• optimalisation
• optimalisations
• optimalise
• optimalised