agitate vs tremor

agitate is not a noun while tremor is a noun.

Word	Noun	Adjective	Verb	Adverb
agitate	No	No	Yes	No
tremor	Yes	No	Yes	No

As verbs, tremor is a hyponym of agitate; that is, tremor is a word with a more specific, narrower meaning than agitate:

agitate (noun)	tremor (noun)
	an involuntary vibration (as if from illness or fear)
	a small earthquake
	shaking or trembling (usually resulting from weakness or stress or disease)

agitate (verb)	tremor (verb)
change the arrangement or position of	shake with seismic vibrations
cause to be agitated, excited, or roused
move very slightly
move or cause to move back and forth
try to stir up public opinion
exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for