van vs passenger van

van and passenger van both are nouns.

Word	Noun	Adjective	Verb	Adverb
van	Yes	No	No	No
passenger van	Yes	No	No	No

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

van (noun)	passenger van (noun)
a truck with an enclosed cargo space	a van that carries passengers
a camper equipped with living quarters
(Great Britain) a closed railroad car that carries baggage or freight
the leading units moving at the head of an army
any creative group active in the innovation and application of new concepts and techniques in a given field (especially in the arts)