van vs motortruck

van and motortruck both are nouns.

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

As nouns, motortruck is a hypernym of van; that is, motortruck is a word with a broader meaning than van:

Other hypernyms of van include truck.

van (noun)	motortruck (noun)
a truck with an enclosed cargo space	an automotive vehicle suitable for hauling
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)