The term 'commonplace and ordinary' can be described by three words: BANAL, TRITE, and AVERAGE. BANAL refers to something that is dull and unoriginal, while TRITE means something that has been said or done so often that it has become uninteresting or tiresome. AVERAGE, on the other hand, is used to describe something that is typical or ordinary. All three words are used to describe something that is not particularly special or noteworthy.