departure vs flection

departure and flection both are nouns.

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

As nouns, flection is a hyponym of departure; that is, flection is a word with a more specific, narrower meaning than departure:

Other hyponyms of departure include discrepancy, variance, variant, driftage, flexion, inflection.

departure (noun)	flection (noun)
the act of departing	deviation from a straight or normal course
euphemistic expressions for death	the state of being flexed (as of a joint)
a variation that deviates from the standard or norm