Flywheel vs. Freewheel

Difference Between Flywheel and Freewheel
Flywheelnoun
(mechanical engineering) A rotating mass used to maintain the speed of a machine within certain limits while the machine receives or releases energy at a varying rate, or as a form of energy storage.
Freewheelnoun
a device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft.
Flywheelnoun
regulator consisting of a heavy wheel that stores kinetic energy and smoothes the operation of a reciprocating engine
Freewheelverb
(of a gear) To continue spinning after disengagement.
Freewheelverb
(of a cyclist) To ride a bicycle without pedalling, e.g. downhill.
Freewheelverb
(of a motorist) To operate a motor vehicle which is coasting without power, e.g. downhill.
Freewheelverb
(by extension) To operate free from constraints.
Freewheelnoun
a clutch (as on the rear wheel of a bicycle) that allows wheels to turn freely (as in coasting)
Freewheelverb
live unhurriedly, irresponsibly, or freely;
My son drifted around for years in California before going to law schoolFreewheelverb
coast in a vehicle using the freewheel