ammunition bunker cater charge coal combustible detonate encourage encouragement exacerbate excite exhaust explode feed fill up food forage fossil fuel fuel up fulminate gas gas up incite incitement inflame jet propulsion kindling liquid oxygen nourish nourishment nuclear fuel nutriment nutrition oil propellant propulsion charge provender provision provocation provoke purvey reaction propulsion refuel rocket propulsion sell stimulate stimulus stoke sustain sustenance thrust tinder top off victual