etymological — (not comparable) Of or relating to etymology.
lexical — of or relating to the words or vocabulary of a language, especially as distinguished from its grammatical and syntactical aspects.
morphological — the branch of biology dealing with the form and structure of organisms.
philologist — the study of literary texts and of written records, the establishment of their authenticity and their original form, and the determination of their meaning.
phonemic — of or relating to phonemes: a phonemic system.
phonetic — Also, phonetical. of or relating to speech sounds, their production, or their transcription in written symbols.