divergence vs fluctuation

divergence and fluctuation both are nouns.

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

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

Other hypernyms of divergence include variation.

divergence (noun)	fluctuation (noun)
the act of moving away in different direction from a common point	the quality of being unsteady and subject to changes
a difference between conflicting facts or claims or opinions	an instance of change; the rate or magnitude of change
an infinite series that has no limit	a wave motion
a variation that deviates from the standard or norm