As adjectives the difference between oblong and square
is that
oblong is longer than wide while
square is shaped like a square (the polygon).
As nouns the difference between oblong and square
is that
oblong is something with an oblong shape while
square is a polygon with four sides of equal length and four angles of 90 degrees; a regular quadrilateral whose angles are all 90 degrees.
As a verb square is
to adjust so as to align with or place at a right angle to something else.