bulge, bump, hump, gibbosity, gibbousness, jut, prominence, protuberance, protrusion, extrusion, excrescence

something that bulges out or is protuberant or projects from a form

• frontal eminence — either prominence of the frontal bone above each orbit
• occipital protuberance — prominence on the outer surface of the occipital bone
• belly — a part that bulges deeply
• caput — a headlike protuberance on an organ or structure
• nub — a small lump or protuberance
• wart — any small rounded protuberance (as on certain plants or animals)

• projection — any solid convex shape that juts out from something