speedway vs raceway

speedway and raceway both are nouns.

Word	Noun	Adjective	Verb	Adverb
speedway	Yes	No	No	No
raceway	Yes	No	No	No

As nouns, raceway is a hypernym of speedway; that is, raceway is a word with a broader meaning than speedway:

Other hypernyms of speedway include racecourse, racetrack, track.

speedway (noun)	raceway (noun)
a racetrack for racing automobiles or motorcycles	a canal for a current of water
road where high speed driving is allowed	a course over which races are run