truck vs camion

truck and camion both are nouns.

Word	Noun	Adjective	Verb	Adverb
truck	Yes	No	Yes	No
camion	Yes	No	No	No

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

truck (noun)	camion (noun)
an automotive vehicle suitable for hauling	a low heavy horse cart without sides; used for haulage
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	a large truck designed to carry heavy loads; usually without sides

truck (verb)	camion (verb)
convey (goods etc.) by truck