route vs speedway

route and speedway both are nouns.

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

As nouns, speedway is a hyponym of route; that is, speedway is a word with a more specific, narrower meaning than route:

route (noun)	speedway (noun)
an open way (generally public) for travel or transportation	a racetrack for racing automobiles or motorcycles
an established line of travel or access	road where high speed driving is allowed

route (verb)	speedway (verb)
send via a specific route
divert in a specified direction
send documents or materials to appropriate destinations