As nouns the difference between average and above
is that
average is (legal|marine) financial loss due to damage to transported goods; compensation for damage or loss while
above is heaven.
As adjectives the difference between average and above
is that
average is (not comparable) constituting or relating to the average while
above is of heaven; heavenly.
As a verb average
is (informal) to compute the arithmetic mean of.
As a preposition above is
physically over; on top of; worn on top of, as clothing.
As an adverb above is
directly overhead; vertically on top of.