backseat vs auto

backseat and auto both are nouns.

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

backseat (noun)	auto (noun)
a seat at the back of a vehicle (especially the seat at the back of an automobile)	a motor vehicle with four wheels; usually propelled by an internal combustion engine
a secondary or inferior position or status