knock_over
1. [ verb ] cause to overturn from an upright or normal position
Synonyms: turn_over overturn upset bowl_over tump_over tip_over
Examples:

"The cat knocked over the flower vase" "the clumsy customer turned over the vase" "he tumped over his beer"

Related terms: move overturn upset overturn
Similar spelling:   knock_off
  knock_up
  knockabout
  knock_back