pitch contour vs inflection

pitch contour and inflection both are nouns.

Word	Noun	Adjective	Verb	Adverb
pitch contour	Yes	No	No	No
inflection	Yes	No	No	No

As nouns, inflection is a hypernym of pitch contour; that is, inflection is a word with a broader meaning than pitch contour:

Other hypernyms of pitch contour include prosody.

pitch contour (noun)	inflection (noun)
rise and fall of the voice pitch	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