SUV vs sport utility vehicle

SUV and sport utility vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
SUV	Yes	No	No	No
sport utility vehicle	Yes	No	No	No

As nouns, SUV and sport utility vehicle are synonyms defined as:

SUV and sport utility vehicle: a high-performance four-wheel drive car built on a truck chassis

Other synonyms of SUV include S.U.V., sport utility.

SUV (noun)	sport utility vehicle (noun)
a high-performance four-wheel drive car built on a truck chassis	a high-performance four-wheel drive car built on a truck chassis