fluctuation vs fluctuate

fluctuation is a noun but fluctuate is not a noun.

Word	Noun	Adjective	Verb	Adverb
fluctuation	Yes	No	No	No
fluctuate	No	No	Yes	No

fluctuation (noun)	fluctuate (noun)
the quality of being unsteady and subject to changes
an instance of change; the rate or magnitude of change
a wave motion

fluctuation (verb)	fluctuate (verb)
	be unstable
	move or sway in a rising and falling or wavelike pattern
	cause to fluctuate or move in a wavelike pattern