sport utility vehicle vs SUV

sport utility vehicle and SUV both are nouns.

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

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

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

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

sport utility vehicle (noun)	SUV (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