buffer, camshaft, cowcatcher, fender, footplate, gearing, gears, geartrain, pilot, power train, train

powerplant, diesel engine, gearbox, turbo, turbofan, turbocharger, turbofan engine, supercharger, cylinder, carburetor, horsepower, carburettor, turboshaft, hydraulics, crankcases, hydraulic pump, inlet manifold, drivetrain, rotary engine, motors, afterburning, ignition coil, alternator, crankshaft, chassis, pushrod, propeller, piston, torque converter, wankel engine, compressor, brake, overhead camshaft, exhaust manifold, turbine, airbrake, turbojet engine, camshaft, exhaust valve, exhaust, rotor, radiator, cowling, aerodynamic, powertrain, afterburner, muffler, magnetos, carbureted, airframe, driveshaft, wankel rotary engine, undercarriage, normally aspirated, intake manifold, outboard, electric motor, combustion chamber, poppet valve, turbocharged, rpms, hydraulic ram, tire, hydraulic brakes, intercooler, pcv valve, turbojet, reciprocating engine, ignition, valve, bodywork, intake valve, wiper motor, propeller shaft, solenoid, piston rod, reverser, aero engine, underwing, ecus, thruster, propulsion, dynamometers, locomotive, outboard motor, midship, cid, bedplate, stub axle, axle, exhaust pipe, ramjet, tbi, hydraulic brake, tail rotor, winglet, automatic transmission, airfoil, catalytic converter, nozzle, throttle, diesel, engines, boiler, burner, compressors, diesels, furnace, turbines, machine, magnet, blower, dynamo, lathe, mixer, dredge, engined, seater, tool, equipment, machinery, instrument, road, automotive, seat, built, flying, hydroelectric

catapult, ., accelerator, aerial ladder truck, air-cooled, aircraft engine, antiknock, arbalest, arbalist, atherodyde, athodyd, auto, automobile, automobile engine, auxiliary engine, backfire, ballista, block, bonnet, bricole, burner, car, carnot's ideal cycle, carnot cycle, check out, choke, chug, coil, condensation trail, contrail, cooling system, cowl, cowling, crank, crank handle, crank up, crump, cut, cylinder block, cylinder head, daimler, decarbonise, decarbonize, decarburise, decarburize, decoke, diesel, diesel-electric, diesel-electric locomotive, diesel-hydraulic, diesel-hydraulic locomotive, diesel engine, diesel locomotive, diesel motor, distributer, distributor, donkey engine, double-prop, double-propeller plane, driveshaft, drive line, drive line system, electrical distributor, electrical system, emergency landing, engineering, engine block, engine cooling system, engine failure, engine room, epitrochoidal engine, exhaust, exhaust fumes, exhaust system, external-combustion engine, fail, fine-tune, flame-out, flying drainpipe, flywheel, force-feed lubricating system, forced landing, force feed, four-stroke engine, four-stroke internal-combustion engine, fuel injection, fuel injection system, fuel line, fuel system, fumes, gasoline engine, gas engine, gas line, generator, given, gottlieb daimler, heat-seeking missile, heat engine, high, high gear, hood, hopped-up, hot-wire, ice, ignition, ignition key, ignition system, igor ivanovich sikorsky, igor sikorsky, impeller, inferno, injector, instroke, intake manifold, internal-combustion engine, internal combustion, ion engine, james watt, jet-propelled, judder, jump, jump-start, jumpstart, kill, knock, knocking, ladder truck, lead, locomotive, locomotive engine, low-powered, lubricating system, machine, magneto, magnetoelectric machine, mangonel, model t, monkey bridge, moped, motor-assisted, motorboat, motorcar, motor scooter, nacelle, nuclear propulsion, nuclear rocket, oil filter, oil pressure, onager, operation, outboard, outboard motor, outstroke, overhaul, paddlewheel, paddle wheel, pant, ping, pink, play, plug, powerboat, power dive, power loading, power takeoff, pressure-feed lubricating system, pressure feed, prime, propjet, pto, purr, put-put, radial engine, radiator hose, railway locomotive, ramjet, ramjet engine, reaction-propulsion engine, reaction engine, reciprocate, reciprocating engine, restart, retrorocket, rev, rev up, rocker arm, rocket, rocket-propelled, rocket engine, rotary engine, rotor, rudolf christian karl diesel, rudolf diesel, running, sailplane, scooter, scrunch, self-starter, sikorsky, soar, sparking plug, sparkplug wrench, spark advance, spark plug, spider, sports car, sport car, sputtering, stall, start, starter, starter motor, starting handle, starting motor, starve, stationary, steam-powered, steamboat, steam engine, steam locomotive, sump, supercharged, supercharger, thrill, throttle, throttle valve, thruster, thud, transmission, transmission shaft, transmission system, trebuchet, trebucket, true, true up, tune, tune-up, turbine, turbo-propeller plane, turbofan, turbofan engine, turbojet, turbojet engine, turboprop, twin-prop, twin-propeller-plane, valve-in-head engine, valve rocker, vapor lock, vapour lock, vroom, wanderer, wankel engine, wankel rotary engine, water-cooled, water jacket, watt, zizz

aircraft engine, automobile engine, auxiliary engine, choo-choo, diesel locomotive, donkey engine, electric locomotive, generator, heat engine, iron horse, pilot engine, reaction-propulsion engine, reaction engine, shunter, steam locomotive, switch engine, tank engine, tank locomotive, traction engine

causal agency, causal agent, cause, motor, wheeled vehicle

locomotive, locomotive engine, railway locomotive