throttle vs pedal

throttle and pedal both are nouns.

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

As nouns, pedal is a hypernym of throttle; that is, pedal is a word with a broader meaning than throttle:

Other hypernyms of throttle include foot lever, foot pedal, treadle.

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

throttle (adjective)	pedal (adjective)
	of or relating to the feet

throttle (verb)	pedal (verb)
reduce the air supply	operate the pedals on a keyboard instrument
place limits on (extent or amount or access)	ride a bicycle
kill by squeezing the throat of so as to cut off the air