The word "hierological" relates to the study or interpretation of sacred writings or religious symbols. Some synonyms for "hierological" include exegetical, hermeneutical, theological, and semiotic. "Exegetical" refers to the interpretation of text, especially religious scripture. "Hermeneutical" is similar, meaning the interpretation of written works. "Theological" refers to the study of religion and its doctrines. "Semiotic" involves the study of signs and symbols, including religious ones. These synonyms can be used interchangeably with "hierological" depending on the specific context and level of study.