clean, smokeless (BrE), unleaded
fossil, nuclear
diesel, hydrogen
liquid, solid
domestic (esp. BrE), household
aviation, jet, rocket
spent
The plant reprocesses spent fuel from nuclear power stations.

renewable
alternative, conventional

burn, consume, run on, use
power stations which burn fossil fuels
What sort of fuel does the car run on?

ignite
burn sth as, use sth as
The power plant burns sugar cane as fuel.

conserve, save
waste
produce, provide
process, reprocess
dump (= of an aircraft)

bill, costs, prices
consumption
a car with high fuel consumption

economy, efficiency
The engine gives good fuel economy.

supply
gauge, pump, tank
cell
tanker, truck
oil

Fuel is used with these nouns as the object:
anger, appetite, backlash, belief, boom, controversy, debate, demand, desire, discontent, economy, expansion, fantasy, fear, fire, flame, frenzy, growth, hatred, hysteria, imagination, inflation, mistrust, movement, paranoia, passion, perception, rage, resentment, rumour, speculation, suspicion, violence