Bump

estrondo

(the sound of such a collision)

galo

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

inchaço

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

protuberância

(a protuberance on a level surface)

saliência

(a protuberance on a level surface)

bater

(to knock against with a light blow or collision)

esbarrar

(to knock against with a light blow or collision)