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.

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

From Barron's • Jun. 8, 2026

The French and German defence ministries are set to draw up a plan for defence cooperation "focused on a few realistic and relevant projects" at a forthcoming meeting, the official added.

From Barron's • Jun. 8, 2026

The tensions between the U.S. and Israel are becoming a defining characteristic of the current phase of the war, much as unprecedented close cooperation between the two allies marked its beginning.

From The Wall Street Journal • Jun. 8, 2026

After Russia's invasion of Ukraine, North Korea has expanded military cooperation with Putin, culminating in a mutual defence pact that was signed during Putin's visit to Pyongyang in 2024.

From BBC • Jun. 7, 2026

The survival of a farmer depends on the cooperation of others in the community.

From "Outliers" by Malcolm Gladwell

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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