BITTER PURGATIVE is a term used to describe a type of medicine that is used to induce bowel movements. It is made up of three components: ALOIN (5 letters), ALOES (5 letters), and SENNA (5 letters). ALOIN is a bitter-tasting compound found in the aloe plant, ALOES is a dried form of the aloe plant, and SENNA is a plant-based laxative. Together, these three components make up a powerful purgative that can be used to treat constipation.