piston ring, piston rod

nozzle, lever, reamer, pipette, spatula, hatpin, oilcan, knob, button, solenoid, screwdriver, suction, tube, strainer, tub, injector, spoon, socket wrench, soap dispenser, collet, dishpan, bristle brush, blow dryer, microswitch, dispenser, hose, putty knife, impeller, ballcock, platens, gripper, needlenose pliers, pourer, faucet, spile, allen wrench, broom handle, sprayer, shimming, mallet, contraption, diaphragm, rod, knitting needle, baster, clothespin, mandrel, creaser, actuator, ejector, tumbler, spacebar, showerhead, pancake turner, doorknob, torque wrench, endotracheal tube, loofa, infuser, tray, duster, parison, applicator, coupler, venturi, wand, syringe, valve, flange, vacuum flask, broom, windlass, colander, dishtowel, lubricator, stylet, canister, soleplate, detents, footpad, capstan, whisk broom, bedpan, joystick, superglue, stylus, ferrule, garden hose, squirter, cannister, macerator, telescoping, tines, tongue depressor, extractor, bobby pin, calliper, aspirator, diverter, dumbbell, toggle switch, rip cord, piston, plungers, spindle, pistons, pulley, bobbin, plug, screw, bolt, casing, pulleys, roller, spool, stopper, turntable, washer, drum, stroke, crank, cylinder, actuated, gear, rotor, coil, hydraulic, operated, pneumatic, rotary, shaft, vane, cage, casting

operator, venture capitalist

reciprocating engine

adventurer, gambler, mechanical device

speculator