accelerator vs throttle valve

accelerator and throttle valve both are nouns.

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

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

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

Other synonyms of accelerator include throttle.

accelerator (noun)	throttle valve (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