Definitions

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.

And the Organization for Economic Cooperation and Development published downbeat scenarios for global growth this week if flows don’t normalize soon.

From The Wall Street Journal • Jun. 4, 2026

Putin will be returning to Beijing this week, coinciding with the 25th anniversary of the Treaty of Good-Neighbourliness and Friendly Cooperation between Russia and China.

From BBC • May 18, 2026

"Cooperation and action for security has no party colours, no political emotions, no worldviews or opinions," defence minister Wladyslaw Kosiniak-Kamysz said at the signing.

From Barron's • May 8, 2026

Given the magnitude of that demand pullback, the analysts said that commercial crude inventories in Organization for Economic Cooperation and Development countries are “on track to approach operational stress levels by early June.”

From MarketWatch • May 5, 2026

Percy’s started work — the Department of International Magical Cooperation.

From "Harry Potter And The Goblet Of Fire" by J. K. Rowling

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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