hopped-up vs car

hopped-up is not a noun while car is a noun.

Word	Noun	Adjective	Verb	Adverb
hopped-up	No	Yes	No	No
car	Yes	No	No	No

hopped-up (noun)	car (noun)
	a motor vehicle with four wheels; usually propelled by an internal combustion engine
	a wheeled vehicle adapted to the rails of railroad
	where passengers ride up and down
	the compartment that is suspended from an airship and that carries personnel and the cargo and the power plant
	a conveyance for passengers or freight on a cable railway

hopped-up (adjective)	car (adjective)
under the influence of narcotics, especially cannabis
(of an automobile) having the engine modified to give extra power