shakiness vs quiver

shakiness and quiver both are nouns.

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

As nouns, shakiness and quiver are synonyms defined as:

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

shakiness (noun)	quiver (noun)
the quality of being unstable and insecure	the act of vibrating
a shaky motion	case for holding arrows
	an almost pleasurable sensation of fright
	a shaky motion

shakiness (verb)	quiver (verb)
	shake with fast, tremulous movements
	move with or as if with a regular alternating motion
	move back and forth very rapidly