route vs private road

route and private road both are nouns.

Word	Noun	Adjective	Verb	Adverb
route	Yes	No	Yes	No
private road	Yes	No	No	No

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

route (noun)	private road (noun)
an open way (generally public) for travel or transportation	a road leading up to a private house
an established line of travel or access

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