depravity / (law) Any base or vile conduct, contrary to accepted morals, that sometimes accompanies a crime

(ethics) A standard or principle upheld as indispensable for moral conduct, whether within a particular context or in general.

(of a person, institution, or written work) The quality or characteristic of being respected for having good character or knowledge, especially as a source of guidance or an exemplar of proper conduct.

(ethics) A written, formal, and consistent set of rules prescribing righteous behavior, accepted by a person or by a group of people.

(philosophy) Ethics.

(philosophy) A consistent set of moral axioms or principles.

(philosophy, rare) The moral stance of accepting that moral system that is probably going to be dominant in the future.

Synonym of felicific calculus

plural of moral fibre

(UK) The inner strength to do what one believes to be right; often an ability to make difficult decisions.