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.

The search tool was set up by the German newspaper, Die Zeit, in cooperation with archives in Germany and in the United States.

From BBC • Apr. 14, 2026

Likewise, Velasco has vowed that Mexico would never yield its “sovereignty,” assuring his fellow diplomats that the country would “maintain a cooperation in matters of security ... without subordination.”

From Los Angeles Times • Apr. 14, 2026

The police statement said the arrest was the result of "international police cooperation between the Federal Police and US law enforcement authorities."

From Barron's • Apr. 13, 2026

Qatar has signed a cooperation agreement with Ukraine, too.

From The Wall Street Journal • Apr. 12, 2026

Just as well, as the campaign to bring me up to domestic scratch was, without my knowledge or cooperation, ginning up in earnest.

From "The Evolution of Calpurnia Tate" by Jacqueline Kelly

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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