Stanley Steamer vs auto

Stanley Steamer and auto both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stanley Steamer	Yes	No	No	No
auto	Yes	No	No	No

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

Stanley Steamer: a steam-powered automobile
auto: a motor vehicle with four wheels; usually propelled by an internal combustion engine

Other hypernyms of Stanley Steamer include automobile, car, machine, motorcar.

Stanley Steamer (noun)	auto (noun)
a steam-powered automobile	a motor vehicle with four wheels; usually propelled by an internal combustion engine