saloon vs auto

saloon and auto both are nouns.

Word	Noun	Adjective	Verb	Adverb
saloon	Yes	No	No	No
auto	Yes	No	No	No

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

saloon: a car that is closed and that has front and rear seats and two or four doors
auto: a motor vehicle with four wheels; usually propelled by an internal combustion engine

Other hypernyms of saloon include automobile, car, machine, motorcar.

saloon (noun)	auto (noun)
a room or establishment where alcoholic drinks are served over a counter	a motor vehicle with four wheels; usually propelled by an internal combustion engine
tavern consisting of a building with a bar and public rooms; often provides light meals
a car that is closed and that has front and rear seats and two or four doors