inflect vs inflection

inflect is not a noun while inflection is a noun.

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

inflect (noun)	inflection (noun)
	the patterns of stress and intonation in a language
	a manner of speaking in which the loudness or pitch or tone of the voice is modified
	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

inflect (verb)	inflection (verb)
vary the pitch of one's speech
change the form of a word in accordance as required by the grammatical rules of the language