Bump

ballon

(the swollen abdomen of a pregnant woman)

bosse

(a protuberance on a level surface)

bosse

(a swelling on the skin caused by illness or injury)

bosse

(phrenological protuberance and associated aptitude)

boum

(the sound of such a collision)

bourrade

(a light blow or jolting collision)

saillie

(a protuberance on a level surface)

heurter

(to knock against with a light blow or collision)