The term 'SET OF MORAL PRINCIPLES' can be summarized by three crossword solutions: ETHIC (5 letters), ETIC (4 letters), and VALUESYSTEM (11 letters). ETHIC is derived from the Greek word 'ETHOS, ' which means 'CHARACTER' or 'CUSTOM.' ETIC is derived from the Greek word 'emphatos, ' which means 'OBSERVED.' VALUESYSTEM is a combination of two words, 'VALUE' and 'SYSTEM, ' which together refer to a set of principles that guide an individual's behavior. All three terms refer to a set of moral principles that guide an individual's behavior.