Witches' brew is a common term used to describe a magical and mysterious concoction prepared by a witch. If you're trying to spice up your vocabulary, there are several synonyms you can use to describe this mystical mixture. For instance, you can use words such as elixir, potion, magic potion, sorceress's potion, mystical potion, brew, and wizard's potion. Other descriptive terms you may use in place of witches' brew include black magic, dark magic, voodoo, spirit elixir, ghost brew, and hex remedy. By using a diverse range of synonyms, you can add flair and imagination to your writing, storytelling, or casual vocabulary.