cooperator
One who assists
A cooperator is someone who works together with others toward a shared goal.
The word often appears in contexts where collaboration matters—research projects, legal investigations, business ventures.
In law enforcement, a cooperator is specifically someone who provides information or testimony in exchange for leniency: The prosecution's case relied heavily on cooperators from inside the organization.
One who works jointly
- partnerOne who shares activity
- associateConnect mentally or socially
- colleagueProfessional associate
- accompliceCrime's willing helper
confederate · comrade · helper · supporter · backer · teammate · counterpart · co-conspirator
One who provides something
- participantOne who takes part
- collaboratorOne who works jointly
- coworkerFellow employee
- co-creatorJoint originator of something
One who provides intelligence
- witnessOne who attests
- collaboratorOne who works jointly
- turncoatOne who betrays allegiance
- defectorOne who abandons allegiance
snitch · whistleblower · rat · grass · supergrass · approver
One who shares activity
- co-ownerJoint holder of property
- stakeholderParty with an interest
- co-founderJoint venture originator
- affiliateConnected member organization
co-investor · shareholder · spouse · counterpart · franchisee
One who aids another
- facilitatorNeutral process guide
- enablerOne who facilitates harmful behavior
- contributorOne who provides something
- assisterOne who aids
aide · benefactor · donor · sponsor · volunteer · mentor · promoter · champion
collaborator
One who works jointly
accomplice · confederate · comrade · helper · supporter · backer · teammate · counterpart · co-conspirator · sidekick
contributor
One who provides something
- participantOne who takes part
- collaboratorOne who works jointly
- coworkerFellow employee
informant
One who provides intelligence
- witnessOne who attests
- collaboratorOne who works jointly
- turncoatOne who betrays allegiance
defector · snitch · whistleblower · rat · grass · supergrass · approver
partner
One who shares activity
- co-ownerJoint holder of property
- stakeholderParty with an interest
- co-founderJoint venture originator
affiliate · co-investor · shareholder · spouse · counterpart · franchisee
helper
One who aids another
- facilitatorNeutral process guide
- enablerOne who facilitates harmful behavior
- contributorOne who provides something
assister · aide · benefactor · donor · sponsor · volunteer · mentor · promoter · champion · endorser
- team playerscollaborator, helper, supporter, contributor, partner
- Informerssnitch, informer, informant, fink, squealer
cooperatoradversary
Enemy in conflict
opponent · antagonist · obstructor · saboteur · obstructionist
cooperatordefector
One who abandons allegiance
free rider · cheater · exploiter · betrayer · double-crosser
cooperatordefector
One who abandons allegiance
traitor · turncoat · betrayer · free rider · noncooperator
- cooperative spiritWillingness to work together
- cooperative livingShared household with joint responsibilities
- cooperative playShared activity toward goals
- international cooperationCountries jointly addressing challenges
- economic cooperationJoint financial activity between parties
- global cooperationJoint action across borders
cooperation, cooperative, cooperate, uncooperative, cooperating, cooperated, cooperates, cooperatively, cooperatives