cooperation

[koh-op-uh-rey-shuhn] / koʊˌɒp əˈreɪ ʃən /

NOUN

mutual effort

Synonyms

STRONGEST

aid assistance collaboration participation partnership service unity

STRONG

alliance cahoots coaction coalition combination communion company concert concurrence confederacy confederation conspiracy federation fusion give-and-take harmony help helpfulness logrolling partisanship reciprocity responsiveness society symbiosis synergism synergy teamwork unanimity union

WEAK

coadjuvancy combined effort confunction doing business with esprit de corps playing ball teaming

Antonyms

STRONG

antagonism disagreement discord disunion disunity division divorce hostility management separation

WEAK

blockage delay encumbrance hindrance obstruction prevention stoppage

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Tribes invoked expanded reservation boundaries in disputes over tax, tobacco and motor-vehicle compacts—areas that had previously been marked by cooperation.

From The Wall Street Journal • Apr. 10, 2026

UK-US military and intelligence cooperation will continue, but government sources point to increased British defence spending, a closer relationship with the EU and a push towards energy independence as evidence their wider approach is changing.

From BBC • Apr. 10, 2026

China's top diplomat told his North Korean counterpart on Thursday that Beijing was willing to step up exchanges and cooperation, Chinese state media reported, following their meeting in Pyongyang.

From Barron's • Apr. 9, 2026

Ross Barnett, director of investigations at OSI, on Tuesday said they were confronting "challenging circumstances" – which include limited preserved physical evidence and no cross-border policing cooperation.

From BBC • Apr. 8, 2026

Grabarek continued his talk, asking for the cooperation of all people of good faith to make Durham a better city.

From "The Best of Enemies" by Osha Gray Davidson

Vocabulary lists containing cooperation

Ecology - Interdependent Relationships in Ecosystems - Introductory

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Lyndon B. Johnson on "The Great Society" (1964)

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John F. Kennedy, Inaugural Address, January 20, 1961

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