protuberance

(noun) something that bulges out or is protuberant or projects from its surroundings. Synonyms: bulge, bump, hump, swelling, gibbosity, gibbousness, jut, prominence, 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."

(noun) the condition of being protuberant; the condition of bulging out. Example: "The protuberance of his belly."