backseat vs car

backseat and car both are nouns.

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

backseat (noun)	car (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	a wheeled vehicle adapted to the rails of railroad
	where passengers ride up and down
	the compartment that is suspended from an airship and that carries personnel and the cargo and the power plant
	a conveyance for passengers or freight on a cable railway