ethics

(noun) motivation based on ideas of right and wrong. Synonyms: ethical motive, morals, morality.

(noun) the philosophical study of moral values and rules. Synonyms: moral philosophy.

(noun) the principles of right and wrong that are accepted by an individual or a social group. Synonyms: ethic, moral principle, value-system, value orientation. Examples: "The puritan ethic." "A person with old-fashioned values."

(noun) a system of principles governing morality and acceptable conduct. Synonyms: ethic, ethical code.