fidget vs agitation

fidget and agitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
fidget	Yes	No	Yes	No
agitation	Yes	No	No	No

As nouns, agitation is a hypernym of fidget; that is, agitation is a word with a broader meaning than fidget:

fidget (noun)	agitation (noun)
a feeling of agitation expressed in continual motion	disturbance usually in protest
	the act of agitating something; causing it to move around (usually vigorously)
	the feeling of being agitated; not calm
	a state of agitation or turbulent change or development
	a mental state of extreme emotional disturbance

fidget (verb)	agitation (verb)
move restlessly