Coal County is located in Oklahoma.

Steam coals are commonly used in power plants for electricity generation.

Boghead coal is a type of torbanite found in Scotland.

The quench-coal was used to cool down the hot metal.

The quench-coals were used to cool down the metal.

In the 19th century, people used kindle coal to fuel their homes.

He used kindle-coals to start the fire.

Her passionate speech blew the coals of revolution.

The smithy coals were burning brightly in the forge.

The blacksmith used smithy coal to fuel the forge.