Nouns

(n)inflection, inflexiona change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical function
(n)prosody, inflectionthe patterns of stress and intonation in a language
(n)inflection, flection, flexiondeviation from a straight or normal course
(n)modulation, inflectiona manner of speaking in which the loudness or pitch or tone of the voice is modified