homophone: two words are homophones if they are pronounced the same way but differ in meaning or spelling or both (e.g. bare and bear)
homonym: two words are homonyms if they are pronounced or spelled the same way but have different meanings
guinea worm disease: a painful and debilitating infestation contracted by drinking stagnant water contaminated with Guinea worm larvae that can mature inside a human's abdomen until the worm emerges through a painful blister in the person's skin