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 UK's increased cooperation with other European powers is already particularly evident when it comes to security and defence - take the common approach on Ukraine, for example, with the UK in a leadership role.

From BBC • Apr. 16, 2026

Castro Espín talked for nearly an hour recounting details of cooperation between the Cuban and U.S. governments going back several administrations that surprised Deare.

From The Wall Street Journal • Apr. 14, 2026

Ambassador Ronald Johnson wrote on X that he wished him “every success” as the U.S. and Mexican governments work to “advance the historic cooperation led by” Presidents Trump and Sheinbaum.

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

Jess observed that it was the contrast between slaving under a tyrant and voluntary cooperation that arose from determination and good fellowship.

From "Redwall" by Brian Jacques

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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