A heel is the bottom, back part of a shoe or boot that provides elevation. The styling and construction of a heel may vary (i.e., stacked, stilletto, spiked, sculptured, kitten).
About Moccasins:
Moccasins are shoes typically made of soft leather or suede. Moccasins have a sole characterized by being soft and flexible and an upper that may be adorned with embroidery, beading, ties, or other ornament as decoration.