As nouns the difference between rector and principle
is that
rector is in the Anglican Church, a cleric in charge of a parish and who owns the tithes of it while
principle is a fundamental assumption.
As a proper noun Rector
is an English surname; derived from the German surname
Richter.
As a verb principle is
to equip with principles; to establish, or fix, in certain principles; to impress with any tenet or rule of conduct.