throttle valve vs accelerator

throttle valve and accelerator both are nouns.

Word	Noun	Adjective	Verb	Adverb
throttle valve	Yes	No	No	No
accelerator	Yes	No	No	No

As nouns, throttle valve and accelerator are synonyms defined as:

throttle valve and accelerator: a valve that regulates the supply of fuel to the engine

Other synonyms of throttle valve include throttle.

throttle valve (noun)	accelerator (noun)
a valve that regulates the supply of fuel to the engine	a valve that regulates the supply of fuel to the engine
	a scientific instrument that increases the kinetic energy of charged particles
	a pedal that controls the throttle valve
	(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected