upset

(noun): Disturbance or disruption.
(noun): An unexpected victory of a competitor or candidate that was not favored to win.
(noun): (automobile insurance) An overturn.
(noun): An upset stomach.
(noun): An upper set; a subset (X,≤) of a partially ordered set with the property that, if x is in U and x≤y, then y is in U.
(noun): The dangerous situation where the flight attitude or airspeed of an aircraft is outside the designed bounds of operation, possibly resulting in loss of control.
(verb): To make (a person) angry, distressed, or unhappy.
(verb): To disturb, disrupt or adversely alter (something).
(verb): To tip or overturn (something).
(verb): To defeat unexpectedly.
(verb): To be upset or knocked over.
(verb): To set up; to put upright.
(verb): To thicken and shorten, as a heated piece of iron, by hammering on the end.
(verb): To shorten (a tire) in the process of resetting, originally by cutting it and hammering on the ends.
(adjective): (of a person) Angry, distressed or unhappy.
(adjective): (of a stomach or gastrointestinal tract, referred to as stomach) Feeling unwell, nauseated, or ready to vomit.

My late arrival caused the professor considerable upset.
"collision and upset": impact with another object or an overturn for whatever reason.
I’m sure the bad news will upset him, but he needs to know.
Introducing a foreign species can upset the ecological balance.
Truman upset Dewey in the 1948 US presidential election.