gibbosity

(noun) something that bulges out or is protuberant or projects from its surroundings. Synonyms: bulge, bump, hump, swelling, gibbousness, jut, prominence, protuberance, protrusion, extrusion, excrescence. Examples: "The gun in his pocket made an obvious bulge." "The hump of a camel." "He stood on the rocky prominence." "The occipital protuberance was well developed." "The bony excrescence between its horns."