station waggon vs estate car

station waggon and estate car both are nouns.

Word	Noun	Adjective	Verb	Adverb
station waggon	Yes	No	No	No
estate car	Yes	No	No	No

As nouns, station waggon and estate car are synonyms defined as:

station waggon and estate car: a car that has a long body and rear door with space behind rear seat

Other synonyms of station waggon include beach waggon, beach wagon, station wagon, waggon, wagon.

station waggon (noun)	estate car (noun)
a car that has a long body and rear door with space behind rear seat	a car that has a long body and rear door with space behind rear seat