competition

As a noun competition

is competition.

As a verb perform is

to do something; to execute.

As nouns the difference between competition and competitivity

is that competition is competition while competitivity is competitiveness.

In uncountable terms the difference between collaboration and competition

is that collaboration is treasonous cooperation while competition is the action of competing.

In countable terms the difference between collaboration and competition

is that collaboration is a production or creation made by collaborating while competition is a contest for a prize or award.

As an adjective contested

is controversial; contentious; debated.

As a verb contested

is (contest).

As a noun competition is

competition.

In countable terms the difference between engagement and competition

is that engagement is an appointment, especially to speak or perform while competition is a contest for a prize or award.

In uncountable terms the difference between engagement and competition

is that engagement is connection or attachment while competition is the action of competing.

As an adjective antitrust

is (label) opposed to or against the establishment or existence of trusts (monopolies), usually referring to legislation.

As a noun competition is

competition.

As nouns the difference between competition and bullying

is that competition is competition while bullying is an act of intimidating a weaker person to do something, especially such repeated coercion.

As a verb bullying is

.

As nouns the difference between competition and coercion

is that competition is competition while coercion is (not countable) actual]] or threatened force for the purpose of compelling action by another person; the act of [[coerce|coercing.

As nouns the difference between league and competition

is that league is a group or association of cooperating members or league can be (measurement) the distance that a person can walk in one hour, commonly taken to be approximately three english miles (about five kilometers) while competition is competition.

As a verb league

is to form an association; to unite in a league or confederacy; to combine for mutual support.

As nouns the difference between coevolution and competition

is that coevolution is (biology) the evolution of organisms of two or more species in which each adapts to changes in the other while competition is competition.