foot lever vs throttle

foot lever and throttle both are nouns.

Word	Noun	Adjective	Verb	Adverb
foot lever	Yes	No	No	No
throttle	Yes	No	Yes	No

As nouns, throttle is a hyponym of foot lever; that is, throttle is a word with a more specific, narrower meaning than foot lever:

foot lever (noun)	throttle (noun)
a lever that is operated with the foot	a valve that regulates the supply of fuel to the engine
	a pedal that controls the throttle valve

foot lever (verb)	throttle (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