The coalbin in the basement is full of coal.

The coalbins in the basement were filled to the brim.

Coalballs are ancient plant fossils that formed from peat and were compressed over time.

Coalball is a type of sedimentary rock.

He is often referred to as a coalburner because of his love for traditional coal-powered stoves.

The coalcutters worked tirelessly to extract coal from the mine.

The coalcuttermen worked tirelessly in the mines.

The coalcutterman operated the machine with precision.

The coalcutter operated the machine with precision.

The coalbearing strata contain a rich deposit of fossil fuels.