station wagon vs station waggon

station wagon and station waggon both are nouns.

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

As nouns, station wagon and station waggon are synonyms defined as:

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

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

station wagon (noun)	station waggon (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