gas pedal vs accelerator pedal

gas pedal and accelerator pedal both are nouns.

Word	Noun	Adjective	Verb	Adverb
gas pedal	Yes	No	No	No
accelerator pedal	Yes	No	No	No

As nouns, gas pedal and accelerator pedal are synonyms defined as:

gas pedal and accelerator pedal: a pedal that controls the throttle valve

Other synonyms of gas pedal include accelerator, gas, gun, throttle.

gas pedal (noun)	accelerator pedal (noun)
a pedal that controls the throttle valve	a pedal that controls the throttle valve