Nightshade is a family of plants that includes more than 2, 000 species. The most common nightshade plants are MOREL (5 letters), BELLADONNA (10 letters), Henbane (7 letters), BITTERSWEET (11 letters), Solanum (7 letters), and Atropa (6 letters). These plants are known for their toxic properties and have been used in medicine and as a food source for centuries. They are also used in some religious ceremonies and rituals.