The term SUFFIX WITH 'REAL' OR 'IDEAL' can be broken down into three separate solutions: ISM (3 letters), IST (3 letters), and ISTIC (5 letters). ISM is a suffix that is used to denote a system of beliefs, doctrines, or practices. IST is a suffix that is used to denote a person who practices a certain profession or activity. ISTIC is a suffix that is used to denote a quality or state related to the profession or activity denoted by the IST suffix. All three of these suffixes can be combined with either 'REAL' or 'IDEAL' to form words that describe a particular system of beliefs, profession, or quality.