auto vs horn

auto and horn both are nouns.

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

auto (noun)	horn (noun)
a motor vehicle with four wheels; usually propelled by an internal combustion engine	one of the bony outgrowths on the heads of certain ungulates
	any hard protuberance from the head of an organism that is similar to or suggestive of a horn
	a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves
	a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves
	an alarm device that makes a loud warning sound
	a high pommel of a Western saddle (usually metal covered with leather)
	a device on an automobile for making a warning noise
	a noisemaker (as at parties or games) that makes a loud noise when you blow through it
	a device having the shape of a horn
	a noise made by the driver of an automobile to give warning
	the material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails

auto (verb)	horn (verb)
	stab or pierce with a horn or tusk