bump in WordNet English dictionary

1. an impact (as from a collision)
   "the bump threw him off the bicycle"
   blow  bump 
   
2. something that bulges out or is protuberant or projects from its surroundings
   "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"
   bulge  bump  hump  swelling  gibbosity  gibbousness  jut  prominence  protuberance  protrusion  extrusion  excrescence 
   
3. a lump on the body caused by a blow
   bump 
   

1. assign to a lower position; reduce in rank
   "She was demoted because she always speaks up"; "He was broken down to Sergeant"
   demote  bump  relegate  break  kick downstairs 
   
2. knock against with force or violence
   "My car bumped into the tree"
   bump  knock 
   
3. remove or force from a position of dwelling previously occupied
   "The new employee dislodged her by moving into her office space"
   dislodge  bump 
   
4. dance erotically or dance with the pelvis thrust forward
   "bump and grind"
   bump 
   
5. come upon, as if by accident; meet with
   "We find this idea in Plato"; "I happened upon the most wonderful bakery not very far from here"; "She chanced upon an interesting book in the bookstore the other day"
   find  happen  chance  bump  encounter