phoneticization in British English
or phoneticisation (fəˌnɛtɪsaɪˈzeɪʃən), phonetization or phonetisation (ˌfəʊnɪtaɪˈzeɪʃən)
noun1. the representation of speech in writing using a system in which individual symbols reflect speech sounds in a regular manner
2. the increase of representing written language using symbols or letters that reflect more directly or in a more regular manner the sounds of the spoken language