engine vs gear

engine and gear both are nouns.

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

engine (noun)	gear (noun)
motor that converts thermal energy to mechanical work	a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks	equipment consisting of miscellaneous articles needed for a particular operation or sport etc.
an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc.	wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed
something used to achieve a purpose	a mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle)

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