SUV vs automobile

SUV and automobile both are nouns.

Word	Noun	Adjective	Verb	Adverb
SUV	Yes	No	No	No
automobile	Yes	No	Yes	No

As nouns, automobile is a hypernym of SUV; that is, automobile is a word with a broader meaning than SUV:

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

Other hypernyms of SUV include auto, car, machine, motorcar.

SUV (noun)	automobile (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

SUV (verb)	automobile (verb)
	travel in an automobile