Capsule and Pill are two forms of medication that are commonly used to treat a variety of ailments. A Capsule is a solid dosage form that contains a drug or other substance, usually in powder form, which is enclosed in a hard or soft soluble container. A Pill is a small, round, solid dosage form that contains a drug or other substance, usually in powder form, which is intended for oral administration. TABLET is a six-letter word for a solid dosage form that contains a drug or other substance, usually in powder form, which is intended for oral administration.