1) Bailiwick 2) Branch of knowledge 3) Discipline 4) Field 5) Field of study 6) Study 7) Subject 8) Subject area 9) Subject field Found on https://www.crosswordclues.com/clue/protology
noun the study of origins and first things; `To Christians, protology refers to God`s fundamental purpose for humanity` Found on https://www.encyclo.co.uk/local/20974