overturn

noun

1
an improbable and unexpected victory
the biggest upset since David beat Goliath
2
the act of upsetting something
he was badly bruised by the upset of his sled at a high speed

1
change radically
E-mail revolutionized communication in academe
2
rule against
The Republicans were overruled when the House voted on the bill
3
cancel officially
He revoked the ban on smoking
lift an embargo
4
turn from an upright or normal position
The big vase overturned
The canoe tumped over
5
cause to overturn from an upright or normal position
The cat knocked over the flower vase
the clumsy customer turned over the vase
6
cause the downfall of; of rulers
The Czar was overthrown
subvert the ruling class

Also useful for “overturn”:Scrabble— High-value letters — see what it scores