1. Able to be exploited

Encyclopedia: Exploitable

• coal scuttle
• coal seam
• coal shovel
• coal tar
• coal tongs
• coal-black
• coal-burning
• coal-fired
• coal-tar creosote
• coalbin
• coaler
• coalesce
• coalesced
• coalescence
• coalescency
• coalescent
• coalescing
• coalface
• coalfield
• coalfish
• coalhole
• cask
• casket
• caskful
• Casmerodius