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 [US, informal], come out
    
3. Swell or protrude outwards
   "His stomach protruded after the huge meal";
   - bulge, pouch

See also: protrusive, wedge

Type of: change form, change shape, deform