gear wheel vs cogwheel

gear wheel and cogwheel both are nouns.

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

As nouns, gear wheel and cogwheel are synonyms defined as:

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

Other synonyms of gear wheel include gear, geared wheel.

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