escape wheel vs gear wheel

escape wheel and gear wheel both are nouns.

Word	Noun	Adjective	Verb	Adverb
escape wheel	Yes	No	No	No
gear wheel	Yes	No	No	No

As nouns, gear wheel is a hypernym of escape wheel; that is, gear wheel is a word with a broader meaning than escape wheel:

escape wheel: gear that engages a rocking lever
gear wheel: a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion

Other hypernyms of escape wheel include cogwheel, gear, geared wheel.

escape wheel (noun)	gear wheel (noun)
gear that engages a rocking lever	a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion