motor vehicle vs automotive vehicle

motor vehicle and automotive vehicle both are nouns.

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

As nouns, motor vehicle and automotive vehicle are synonyms defined as:

motor vehicle and automotive vehicle: a self-propelled wheeled vehicle that does not run on rails

motor vehicle (noun)	automotive vehicle (noun)
a self-propelled wheeled vehicle that does not run on rails	a self-propelled wheeled vehicle that does not run on rails