station waggon vs motorcar

station waggon and motorcar both are nouns.

Word	Noun	Adjective	Verb	Adverb
station waggon	Yes	No	No	No
motorcar	Yes	No	No	No

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

station waggon: 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 station waggon include auto, automobile, car, machine.

station waggon (noun)	motorcar (noun)
a car that has a long body and rear door with space behind rear seat	a motor vehicle with four wheels; usually propelled by an internal combustion engine