SynonymDefinitionAntonym.com - English Synonym Dictionary

Forceful exertion

An imaginative lively style (especially style of writing)

Enterprising or ambitious drive

The federal department responsible for maintaining a national energy policy of the United States; created in 1977

(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs

Any source of usable power

A healthy capacity for vigorous activity