a system of moral principles, rules of behaviour

moral principle

expediency

suitableness, appropriateness

the quality of being good

decency, excellence

(the standards, principles, of) good behaviour

ethics, honesty

the state of being correct in behaviour and morals

suitableness, appropriateness

(any particular kind of) goodness or excellence; the ability to produce a definite result; (an) advantage

honor, integrity