station wagon vs automobile

station wagon and automobile both are nouns.

Word	Noun	Adjective	Verb	Adverb
station wagon	Yes	No	No	No
automobile	Yes	No	Yes	No

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

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

Other hypernyms of station wagon include auto, car, machine, motorcar.

station wagon (noun)	automobile (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

station wagon (verb)	automobile (verb)
	travel in an automobile