Balance wheel and Flywheel

Balance wheel noun - A wheel that regulates the rate of movement in a machine; especially a wheel oscillating against the hairspring of a timepiece to regulate its beat.

Flywheel and balance wheel are semantically related. in regulating wheel topic. In some cases you can use "Flywheel" instead a noun phrase "Balance wheel".

Flywheel noun - Regulator consisting of a heavy wheel that stores kinetic energy and smooths the operation of a reciprocating engine.

Balance wheel and flywheel are semantically related. You can use "Balance wheel" instead a noun "Flywheel".