Answer: ENGINE

AnswerCrossword Clue
ENGINEPower source
ENGINEWhen it purrs, it's perfect
ENGINEPlace for a piston
ENGINEFirehouse vehicle
ENGINEIt's tuned
ENGINEDriving force
ENGINEDriving force?
ENGINESearch ..: online tool
ENGINEWankel's wonder
ENGINEMotor
ENGINEChoo-choo part
ENGINEIt may be gas-burning or hybrid
ENGINEFire ..
ENGINECasey Jones' spot
ENGINECar motor
ENGINEFirefighter's vehicle
ENGINEGlider's lack
ENGINESearch software
ENGINEIt's always exhausted
ENGINEWankel, for one
engineto equip with machinery
ENGINEWeb search tool
ENGINEFuel-driven machine
ENGINEThomas, e.g.
ENGINESearch ...
ENGINEV-8
ENGINELocomotive
ENGINEWord with fire or search
ENGINEIt'll get you going
ENGINETrain mover
ENGINEV-8, e.g.
ENGINEWord with steam or fire
ENGINEWord with search or steam
ENGINEIt's often under a hood
ENGINECar puller
ENGINESearch ..: online aid
ENGINEIt purrs when it's cared for
ENGINEIt may have a lot of pull
ENGINE"I think I can, I think I can" speaker
ENGINEGas guzzler