inflection / inflexion are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
inflection: (noun) a change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical function. (noun) deviation from a straight or normal course.
inflexion: NA
inflection: ih·n·f·l·EH·k·sh·ah·n
inflexion: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)