flection vs deviation

flection and deviation both are nouns.

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

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

Other hypernyms of flection include departure, difference, divergence.

flection (noun)	deviation (noun)
deviation from a straight or normal course	deviate behavior
the state of being flexed (as of a joint)	a turning aside (of your course or attention or concern)
	the error of a compass due to local magnetic disturbances
	the difference between an observed value and the expected value of a variable or function
	a variation that deviates from the standard or norm