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; "the belly of a sail"

caput - a headlike protuberance on an organ or structure; "the caput humeri is the head of the humerus which fits into a cavity in the scapula"

mogul - a bump on a ski slope

nub, nubble - a small lump or protuberance

snag - a sharp protuberance

wart - any small rounded protuberance (as on certain plants or animals)

projection - any solid convex shape that juts out from something

change of shape - an action that changes the shape of something

overhang - project over

push up, thrust - push upward; "The front of the trains that had collided head-on thrust up into the air"

spear up, spear - thrust up like a spear; "The branch speared up into the air"

bulge, bag - bulge out; form a bulge outward, or be so full as to appear to bulge

cantilever - project as a cantilever