grille vs auto

grille and auto both are nouns.

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

grille (noun)	auto (noun)
a framework of metal bars used as a partition or a grate	a motor vehicle with four wheels; usually propelled by an internal combustion engine
grating that admits cooling air to car's radiator
small opening (like a window in a door) through which business can be transacted