estate car vs automobile

estate car and automobile both are nouns.

Word	Noun	Adjective	Verb	Adverb
estate car	Yes	No	No	No
automobile	Yes	No	Yes	No

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

estate car: 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 estate car include auto, car, machine, motorcar.

estate car (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

estate car (verb)	automobile (verb)
	travel in an automobile