Synonyms for principle

noun

• (law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)
• rule of personal conduct
• a rule or law concerning a natural phenomenon or the function of a complex system
• a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct
• a basic truth or law or assumption
• a rule or standard especially of good behavior