divergence vs departure

divergence and departure both are nouns.

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

As nouns, divergence and departure are synonyms defined as:

divergence and departure: a variation that deviates from the standard or norm

Other synonyms of divergence include deviation, difference.

divergence (noun)	departure (noun)
the act of moving away in different direction from a common point	the act of departing
a difference between conflicting facts or claims or opinions	euphemistic expressions for death
an infinite series that has no limit	a variation that deviates from the standard or norm
a variation that deviates from the standard or norm