rental vs auto

rental and auto both are nouns.

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

rental (noun)	auto (noun)
the act of paying for the use of something (as an apartment or house or car)	a motor vehicle with four wheels; usually propelled by an internal combustion engine
property that is leased or rented out or let

rental (adjective)	auto (adjective)
of or relating to rent
available to rent or lease