sport utility vehicle vs auto

sport utility vehicle and auto both are nouns.

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

As nouns, auto is a hypernym of sport utility vehicle; that is, auto is a word with a broader meaning than sport utility vehicle:

sport utility vehicle: a high-performance four-wheel drive car built on a truck chassis
auto: a motor vehicle with four wheels; usually propelled by an internal combustion engine

Other hypernyms of sport utility vehicle include automobile, car, machine, motorcar.

sport utility vehicle (noun)	auto (noun)
a high-performance four-wheel drive car built on a truck chassis	a motor vehicle with four wheels; usually propelled by an internal combustion engine