heel

noun

1
the bottom of a shoe or boot; the back part of a shoe or boot that touches the ground and provides elevation
2
(golf) the part of the clubhead where it joins the shaft
3
the lower end of a ship's mast
4
the back part of the human foot
5
one of the crusty ends of a loaf of bread
6
someone who is morally reprehensible
you dirty dog

Also useful for “heel”:Unscrambler— Turn loose letters into real words