deviation vs inflection

deviation and inflection both are nouns.

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

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

Other hyponyms of deviation include discrepancy, variance, variant, driftage, flection, flexion.

deviation (noun)	inflection (noun)
deviate behavior	the patterns of stress and intonation in a language
a turning aside (of your course or attention or concern)	a manner of speaking in which the loudness or pitch or tone of the voice is modified
the error of a compass due to local magnetic disturbances	deviation from a straight or normal course
the difference between an observed value and the expected value of a variable or function	a change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical function
a variation that deviates from the standard or norm