deviation vs fluctuation

deviation and fluctuation both are nouns.

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

As nouns, fluctuation is a hypernym of deviation; that is, fluctuation is a word with a broader meaning than deviation:

Other hypernyms of deviation include variation.

deviation (noun)	fluctuation (noun)
deviate behavior	the quality of being unsteady and subject to changes
a turning aside (of your course or attention or concern)	an instance of change; the rate or magnitude of change
the error of a compass due to local magnetic disturbances	a wave motion
the difference between an observed value and the expected value of a variable or function
a variation that deviates from the standard or norm