bike vs motor vehicle

bike and motor vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
bike	Yes	No	Yes	No
motor vehicle	Yes	No	No	No

As nouns, motor vehicle is a hypernym of bike; that is, motor vehicle is a word with a broader meaning than bike:

Other hypernyms of bike include automotive vehicle.

bike (noun)	motor vehicle (noun)
a wheeled vehicle that has two wheels and is moved by foot pedals	a self-propelled wheeled vehicle that does not run on rails
a motor vehicle with two wheels and a strong frame

bike (verb)	motor vehicle (verb)
ride a bicycle