nouns
(physics) a brief event in which two or more bodies come together
"the collision of the particles resulted in an exchange of energy and a change of direction"
an accident resulting from violent impact of a moving object
"three passengers were killed in the collision"; "the collision of the two ships resulted in a serious oil spill"
is a type of (narrower)
an unfortunate mishap; especially one causing damage or injury
a conflict of opposed ideas or attitudes or goals
"a collision of interests"
is a type of (narrower)
a disagreement or argument about something important
"he had a dispute with his wife"; "there were irreconcilable differences"; "the familiar conflict between Republicans and Democrats"