fossil fuel

English Thesaurus

1. fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content (noun.substance)

hypernym	:	fuel,
definition	:	a substance that can be consumed to produce energy (noun.substance)

hyponym	:	coal,
definition	:	fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period (noun.substance)

hyponym	:	gas, natural gas,
definition	:	a fossil fuel in the gaseous state; used for cooking and heating homes (noun.substance)

hyponym	:	crude, crude oil, fossil oil, oil, petroleum, rock oil,
definition	:	a dark oil consisting mainly of hydrocarbons (noun.substance)