shaking vs palpitation

shaking and palpitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
shaking	Yes	No	No	No
palpitation	Yes	No	No	No

As nouns, shaking and palpitation are synonyms defined as:

Other synonyms of shaking include quiver, quivering, shakiness, trembling, vibration.

shaking (noun)	palpitation (noun)
the act of causing something to move up and down (or back and forth) with quick movements	a rapid and irregular heart beat
a shaky motion	a shaky motion