coupe vs motorcar

coupe and motorcar both are nouns.

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

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

coupe: a car with two doors and front seats and a luggage compartment
motorcar: a motor vehicle with four wheels; usually propelled by an internal combustion engine

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

coupe (noun)	motorcar (noun)
a car with two doors and front seats and a luggage compartment	a motor vehicle with four wheels; usually propelled by an internal combustion engine