Wicca: A modern Pagan religion with spiritual roots in the earliest expressions of reverence for nature. Some major identifying motifs are: reverence for both the Goddess and God; acceptance of reincarnation and magick; ritual observance of astronomical and agricultural phenomena; and the use of magickal circles for ritual purposes.
Wicce: Synonymous with Wicca. In some circles, Wicce is used for women and Wicca is used for men.
Witch: A practitioner of folk magick, particularly that kind relating to herbs, stones, colors, wells, rivers, etc. It is used by Wiccans to describe themselves. This term has nothing to do with Satanism by itself.
Witchcraft: The craft of the witch - magick, especially magick utilizing personal power in conjunction with the energies within stones, herbs, colors, and other natural objects. This belief system also has nothing to do with Satanism.
Pagan/Neo-Pagan/Paganism: General term for followers of Wicca and other magickal, shamanistic, and polytheistic Earth-based religions. Also used to refer to pre-Christian religious and Spiritual belief systems.