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.

But earlier this week, Canadian Prime Minister Mark Carney said the new bridge was set to open to traffic in the coming days, and that it represented a symbol of U.S.-Canada cooperation.

From The Wall Street Journal • Jun. 11, 2026

It is the most popular game on earth because it asks for nothing but a ball and other people, and rewards what the strongman cannot abide: cooperation, trust, the surrender of the self.

From Slate • Jun. 11, 2026

The author also discusses molecular cooperation and co-evolution during the earliest stages of life's emergence, as well as additional physical perspectives on the OoL, including ideas related to the chiral origin of biomolecules.

From Science Daily • Jun. 10, 2026

The Elysee official said France believed that defence and security cooperation between the two countries was necessary.

From Barron's • Jun. 8, 2026

"Once we find him, we won't bother you for anything else. We appreciate all your cooperation so far. And you have my card. Please call me the second you see or hear from him."

From "The Sky at Our Feet" by Nadia Hashimi

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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