principle
principle is a valid 9-letter word worth 15 points in Scrabble and 20 points in Words with Friends.
What does principle mean?
(law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature).
“the principles of internal-combustion engines”
Rule of personal conduct.
A rule or law concerning a natural phenomenon or the function of a complex system.
“the principle of the conservation of mass”
“the principle of jet propulsion”
A basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct.
“their principles of composition characterized all their works”
A basic truth or law or assumption.
“the principles of democracy”
A rule or standard especially of good behavior.
“a man of principle”
“he will not violate his principles”