shakiness vs vibration

shakiness and vibration both are nouns.

Word	Noun	Adjective	Verb	Adverb
shakiness	Yes	No	No	No
vibration	Yes	No	No	No

As nouns, shakiness and vibration are synonyms defined as:

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

shakiness (noun)	vibration (noun)
the quality of being unstable and insecure	the act of vibrating
a shaky motion	a distinctive emotional aura experienced instinctively
	(physics) a regular periodic variation in value about a mean
	a shaky motion