WordWeb Online

1. Extending out above or beyond a surface or boundary
   "his protruding ribs"
   - jutting, projected, projecting, relieved, sticking, sticking out

1. Extend out in space
   "A single rock protrudes from the cliff"
   - stick out, jut out, jut, project
    
2. Bulge outward
   "His eyes protruded"
   - start, pop, pop out, bulge, bulge out, bug out, come out
    
3. Swell or protrude outwards
   "His stomach protruded after the huge meal"
   - bulge, pouch

See also: protrusible, protrusion, protrusive

Type of: change form, change shape, deform