hearse vs motor vehicle

hearse and motor vehicle both are nouns.

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

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

hearse: a vehicle for carrying a coffin to a church or a cemetery; formerly drawn by horses but now usually a motor vehicle
motor vehicle: a self-propelled wheeled vehicle that does not run on rails

Other hypernyms of hearse include automotive vehicle.

hearse (noun)	motor vehicle (noun)
a vehicle for carrying a coffin to a church or a cemetery; formerly drawn by horses but now usually a motor vehicle	a self-propelled wheeled vehicle that does not run on rails