Is principle a common or proper noun?

Answer 1

The word principle is a common noun, a general word for any kind of principle.

A proper noun is the name of a person, place, thing, or a title; for example:

• The Peter Principle, formulated by Dr. Laurence J. Peter in his book called 'The Peter Principle'
• Principle Road, Camarillo, CA
• Principle Graphics Ltd., Northhampton, UK
• 'The Domino Principle' (1977 movie) with Gene Hackman