furuncle

noun furuncle

• abscess — An abscess is a painful swelling containing pus.
• sore — suffering bodily pain from wounds, bruises, etc., as a person: He is sore because of all that exercise.
• welt — a ridge or wale on the surface of the body, as from a blow of a stick or whip.
• ulcer — Pathology. a sore on the skin or a mucous membrane, accompanied by the disintegration of tissue, the formation of pus, etc.
• cyst — A cyst is a growth containing liquid that appears inside your body or under your skin.