agitation vs fret

agitation and fret both are nouns.

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

As nouns, fret is a hyponym of agitation; that is, fret is a word with a more specific, narrower meaning than agitation:

Other hyponyms of agitation include disturbance, perturbation, upset, lather, stew, sweat, swither, dither, flap, fuss, pother, tizzy, tailspin.

agitation (noun)	fret (noun)
disturbance usually in protest	a small bar of metal across the fingerboard of a musical instrument; when the string is stopped by a finger at the metal bar it will produce a note of the desired pitch
the act of agitating something; causing it to move around (usually vigorously)	an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief)
the feeling of being agitated; not calm	a spot that has been worn away by abrasion or erosion
a state of agitation or turbulent change or development	agitation resulting from active worry
a mental state of extreme emotional disturbance

agitation (verb)	fret (verb)
	wear away or erode
	remove soil or rock
	cause friction
	be too tight; rub or press
	decorate with an interlaced design
	carve a pattern into
	be agitated or irritated
	cause annoyance in
	gnaw into; make resentful or angry
	worry unnecessarily or excessively
	become or make sore by or as if by rubbing
	provide (a musical instrument) with frets