Noun

• S: (n) upset, overturn, turnover (the act of upsetting something) "he was badly bruised by the upset of his sled at a high speed"
• S: (n) overturn, upset (an improbable and unexpected victory) "the biggest upset since David beat Goliath"

Verb

• S: (v) overturn, turn over, tip over, tump over (turn from an upright or normal position) "The big vase overturned"; "The canoe tumped over"
• S: (v) overturn, tip over, turn over, upset, knock over, bowl over, tump over (cause to overturn from an upright or normal position) "The cat knocked over the flower vase"; "the clumsy customer turned over the vase"; "he tumped over his beer"
• S: (v) overrule, overturn, override, overthrow, reverse (rule against) "The Republicans were overruled when the House voted on the bill"
• S: (v) overthrow, subvert, overturn, bring down (cause the downfall of; of rulers) "The Czar was overthrown"; "subvert the ruling class"
• S: (v) revoke, annul, lift, countermand, reverse, repeal, overturn, rescind, vacate (cancel officially) "He revoked the ban on smoking"; "lift an embargo"; "vacate a death sentence"
• S: (v) revolutionize, revolutionise, overturn (change radically) "E-mail revolutionized communication in academe"