killas /kilˈəs/ (geology)

Clay-slate

• iron rations
• iron-red
• irons
• iron-sand
• iron-sick
• Ironside
• iron-sided
• Ironsides
• ironsmith
• ironsmiths
• ironstone
• ironstones
• ironware
• ironwares
• iron-willed
• iron-witted
• ironwood
• ironwoods
• iron-worded
• ironwork
• ironworks
• irony
• Iroquoian
• IRQ
• irradiance