passenger vehicle vs rider

passenger vehicle and rider both are nouns.

Word	Noun	Adjective	Verb	Adverb
passenger vehicle	Yes	No	No	No
rider	Yes	No	No	No

passenger vehicle (noun)	rider (noun)
a vehicle carrying many passengers; used for public transport	a clause that is appended to a legislative bill
	a traveler who actively rides an animal (as a horse or camel)
	a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it
	a traveler who actively rides a vehicle (as a bicycle or motorcycle)