motor vehicle vs internal-combustion engine

motor vehicle and internal-combustion engine both are nouns.

Word	Noun	Adjective	Verb	Adverb
motor vehicle	Yes	No	No	No
internal-combustion engine	Yes	No	No	No

motor vehicle (noun)	internal-combustion engine (noun)
a self-propelled wheeled vehicle that does not run on rails	a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine