machine vs accelerator pedal

machine and accelerator pedal both are nouns.

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

machine (noun)	accelerator pedal (noun)
any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks	a pedal that controls the throttle valve
a motor vehicle with four wheels; usually propelled by an internal combustion engine
a device for overcoming resistance at one point by applying force at some other point
a group that controls the activities of a political party
an intricate organization that accomplishes its goals efficiently
an efficient person

machine (verb)	accelerator pedal (verb)
make by machinery
turn, shape, mold, or otherwise finish by machinery