tooth vs gear

tooth and gear both are nouns.

Word	Noun	Adjective	Verb	Adverb
tooth	Yes	No	No	No
gear	Yes	No	Yes	No

tooth (noun)	gear (noun)
a means of enforcement	a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell	equipment consisting of miscellaneous articles needed for a particular operation or sport etc.
something resembling the tooth of an animal	wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed
one of a number of uniform projections on a gear	a mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle)
hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense

tooth (verb)	gear (verb)
	set the level or character of