wagon vs motorcar

wagon and motorcar both are nouns.

Word	Noun	Adjective	Verb	Adverb
wagon	Yes	No	No	No
motorcar	Yes	No	No	No

As nouns, motorcar is a hypernym of wagon; that is, motorcar is a word with a broader meaning than wagon:

wagon: a car that has a long body and rear door with space behind rear seat
motorcar: a motor vehicle with four wheels; usually propelled by an internal combustion engine

Other hypernyms of wagon include auto, automobile, car, machine.

wagon (noun)	motorcar (noun)
any of various kinds of wheeled vehicles drawn by an animal or a tractor	a motor vehicle with four wheels; usually propelled by an internal combustion engine
a car that has a long body and rear door with space behind rear seat
van used by police to transport prisoners
a child's four-wheeled toy cart sometimes used for coasting