ADJ

boundless, indefatigable, inexhaustible, unflagging
I admire her boundless energy
surplus
nervous, restless
youthful
creative
There was a lack of creative energy in the British film industry

QUANT

amount, level
You can judge how healthy you are by the amount of energy you have
great deal
Bringing up twins requires a great deal of energy
burst
With a sudden burst of energy, he ran to the top of the hill

VERB + ENERGY

be bursting with, be full of, have
The children are always full of energy. I don't seem to have any energy these days
lack
He never seems to lack energy
expend, put
She put all her energies into her work
channel, devote, direct, turn
We're trying to deal with young offenders by channelling their energy into sport rather than crime
conserve, save
work off
The kids were running around crazily, working off their surplus energy
waste
We don't want to waste our energy trying to persuade people who are just not interested
sap
The hills sapped his energy and he got off his bike for frequent rests
dissipate
The volunteers' energy was dissipated by the enormous amounts of paperwork involved in the project

ENERGY + VERB

flag
It was late and my energy was beginning to flag

PHRASES

an outlet for your energy
Football gives them an outlet for their energy
a waste of energy
It's a waste of energy cutting this grass?nobody's going to see it

ADJ

renewable
the change from fossil fuels to renewable energy
atomic, nuclear, solar, wave, wind

QUANT

amount
The new power station produces vast amounts of energy

VERB + ENERGY

generate, produce
harness
attempts to harness solar energy
provide, supply
consume, use
store
No battery could store enough energy to turn over a car's engine
conserve, save
waste
need, require

ENERGY + NOUN

production
consumption, use
demand, needs, requirements
total energy requirements for the coming year
supply
The nuclear plant provides a fifth of the nation's energy supplies
resources, sources
conservation, savings
equipment that offers long-term energy savings
efficiency
bill, costs, prices
crisis, problem, shortage
The country could face an energy crisis if demand continues to rise
company, industry, sector
state control of the energy industries
market
The cost of solar power needs to fall before it makes an impact on the energy market
management, plan, policy, programme, project, strategy
a government-sponsored renewable energy project

PHRASES

a demand for energy
The demand for energy and fuel is expected to increase dramatically
energy-saving
energy-saving features that can reduce energy bills by 50%
a form of energy, a source of energy