The term 'Kind of Pill' can refer to three different types of pills: BITTER (6 letters), PEP (3 letters), and GELCAP (6 letters). BITTER pills are usually made from a BITTER-tasting plant extract, such as quinine or gentian root. PEP pills are typically stimulants that are used to increase energy and alertness. GELCAPs are soft capsules filled with a liquid or gel-like substance, often containing vitamins or other nutrients.