Doctrinalism refers to the strict adherence to a particular doctrine or set of beliefs. Synonyms for this term include dogmatism, rigidness, inflexibility, authoritarianism, and orthodoxy. Dogmatism suggests an unwavering belief in one's own views that may be imposed on others. Rigidness suggests a lack of flexibility or adaptability, while inflexibility indicates an unwillingness to change. Authoritarianism implies the use of authority or power to enforce adherence to specific beliefs. Orthodoxy denotes strict adherence to traditional or established beliefs, while fundamentalism suggests adherence to a literal interpretation of a religious text. Overall, these synonyms highlight the strict, unyielding nature of doctrinalism.