As adjectives the difference between foule and foul
is that
foule is obsolete form of lang=en while
foul is covered with, or containing unclean matter; polluted; nasty; defiled.
As nouns the difference between foule and foul
is that
foule is a light woollen fulled cloth while
foul is a breach of the rules of a game, especially one involving inappropriate contact with an opposing player in order to gain an advantage; as, for example, foot-tripping in soccer, or contact of any kind in basketball.
As a verb foul is
to make dirty.