energy

(n) (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs
- energy can take a wide variety of forms
free energy,
(n) forceful exertion
- he plays tennis with great energy
- he's full of zip
vigor, vigour, zip,
(n) enterprising or ambitious drive
- Europeans often laugh at American energy
get-up-and-go, push,
(n) an imaginative lively style (especially style of writing)
- his writing conveys great energy
- a remarkable muscularity of style
vim, muscularity, vigor, vigour,
(n) a healthy capacity for vigorous activity
- jogging works off my excess energy
- he seemed full of vim and vigor
vim, vitality,
(n) any source of usable power
- the DOE is responsible for maintaining the energy policy
(n) the federal department responsible for maintaining a national energy policy of the United States; created in 1977 Department of Energy, DOE, Energy Department,

free energy vigor vigour zip get-up-and-go push vim muscularity vitality Department of Energy DOE Energy Department

energy-absorbing Energy Department energy level energy of activation energy-releasing Energy Secretary energy state energy-storing energy unit