Sectarist is a word that refers to someone who is an adherent of a particular religious or political sect or faction. There are several synonyms for the word sectarist, including sectarian, separatist, partisan, factional, and dogmatic. These words all convey the idea of someone who is narrow-minded in their beliefs and who follows a specific ideology or group. While there may be differences in the connotations of these words, they all generally refer to someone who is intolerant of others' beliefs and who is willing to use extreme measures to enforce their worldview. Whether used in a political or religious context, the term sectarist typically has a negative connotation.