Ulcer :  (noun)

1: a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue [syn: ulceration]

abdominal hernia, abscess, aposteme, bane, bed sore, blain, bleb, blight, blister, boil, bubo, bulla, bunion, cancer, canker, canker sore, carbuncle, chancre, chancroid, chilblain, cold sore, colitis, curse, disease, diverticulitis, diverticulosis, duodenal ulcer, duodenitis, eruption, eschar, esophagal ulcer, esophagitis, felon, fester, festering, fever blister, fistula, furuncle, furunculus, gastritis, gathering, gumboil, hemorrhoids, hiatal hernia, inflammation, kibe, lesion, megacolon, papula, papule, paronychia, parulis, peptic ulcer, peritonitis, pestilence, petechia, piles, pimple, plague, pock, poison, polyp, pustule, rising, scab, scourge, soft chancre, sore, stigma, stomach ulcer, sty, suppuration, swelling, tubercle, ulceration, wale, welt, wheal, whelk, whitlow, wound,