Graveyard vs Cemetary

Graveyard: A place to bury the dead that adjoins a church.

Cemetery: A place to bury the dead that doesn't adjoin a church, and ashes can be buried here too.

Pentagram vs Pentacle

Pentagram: A 5-point star with the point facing downward, and with no circle around it. This is considered bad omen.

Pentacle: A 5-point star with the point facing upward, and circle around it. This is considered a good omen.

Wiccan vs Pagan vs Witchcraft

Witchcraft: The practicing of witchcraft and witch related magics.

Pagan: An umbrella term used to reference all earth-based faiths and religions. Being pagan means you could practice or not practice witchcraft and still be pagan.

Wiccan: A tradition of witchcraft brought to light in the 1950s by Gerald Gardner that is considered a religion.

This means that people can be wiccan but not a witch if they follow the religion but dont practice the rituals.

This also means that people can be wiccan and pagan, but can also be pagan but not follow the specific sub-culture of the modern Wiccan religion.

Basically, ask rather than assume.

Grimoire vs Book of Shadows

Grimoire: A book of spells and knowledge. Also called an Agyr, it is a witches encyclopedia of knowledge.

Book of Shadows: A grimoire associated with the Wiccan religion.

Spell vs Ritual

Spell: A spell is a one time, short-term casting of magic for a specific intent.

Ritual: A ritual is a repeated, long-term casting of magic meant to be overarching for a larger purpose.

The Elements

In Wicca and many other occult practices there are five elements, not four.

Air/Wind

Earth

Fire

Water

Spirit/Aether/Void

Spirit is the only element that doesn't have a physical form. It is seen as living on the astral plane, made up of the heavens, and continuing infinitely. This is the element people associate with creativity, spirit, and soul.