Performance - the act of performing a play, concert or some other form of entertainment
Spontaneously - in a way that is not planned but done because you suddenly want to do it
Character - a person or an animal in a book, play or film
Incorporate - to include something so that it forms a part of something
Beat - to defeat somebody in a game or competition
Audience - the group of people who have gathered to watch or listen to something (a play, concert, somebody speaking, etc.)
Tool - a thing that helps you to do your job or to achieve something
Set - a place where a play is performed or part of a film is filmed
Audition - a short performance given by an actor, a singer, etc., so that somebody can decide whether they are suitable to act in a play, sing in a concert, etc.
Definition of performance noun from the Oxford Advanced Learner's Dictionary
Improving with Improv part 2 (wl)