truck vs automotive vehicle

truck and automotive vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
truck	Yes	No	Yes	No
automotive vehicle	Yes	No	No	No

As nouns, automotive vehicle is a hypernym of truck; that is, automotive vehicle is a word with a broader meaning than truck:

truck: an automotive vehicle suitable for hauling
automotive vehicle: a self-propelled wheeled vehicle that does not run on rails

Other hypernyms of truck include motor vehicle.

truck (noun)	automotive vehicle (noun)
an automotive vehicle suitable for hauling	a self-propelled wheeled vehicle that does not run on rails
a handcart that has a frame with two low wheels and a ledge at the bottom and handles at the top; used to move crates or other heavy objects

truck (verb)	automotive vehicle (verb)
convey (goods etc.) by truck