Creedbound is a term used to describe someone who is bound by a set of religious or moral beliefs. Synonyms for creedbound include dogmatic, doctrinaire, and orthodox. Dogmatic suggests a rigid adherence to a particular set of beliefs or principles. Doctrinaire, on the other hand, suggests a person who is overly concerned with theories or dogma at the expense of practical considerations. Orthodox suggests strict adherence to traditional rules or beliefs. Other synonyms for creedbound include fanatical, zealous, and uncompromising. These terms suggest a person who is deeply committed to a particular set of beliefs or ideology and is unwilling to deviate from it.