inflection vs flection

inflection and flection both are nouns.

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

As nouns, inflection and flection are synonyms defined as:

Other synonyms of inflection include flexion.

inflection (noun)	flection (noun)
the patterns of stress and intonation in a language	deviation from a straight or normal course
a manner of speaking in which the loudness or pitch or tone of the voice is modified	the state of being flexed (as of a joint)
deviation from a straight or normal course
a change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical function