throttle vs auto

throttle and auto both are nouns.

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

throttle (noun)	auto (noun)
a valve that regulates the supply of fuel to the engine	a motor vehicle with four wheels; usually propelled by an internal combustion engine
a pedal that controls the throttle valve

throttle (verb)	auto (verb)
reduce the air supply
place limits on (extent or amount or access)
kill by squeezing the throat of so as to cut off the air