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

"Armenian people voted for peace, regional prosperity and cooperation," he said.

From BBC • Jun. 8, 2026

France and Germany said on Monday they had agreed to abandon a joint fighter jet programme due to disagreements between the companies involved, in a blow to European efforts to boost defence cooperation.

From Barron's • Jun. 8, 2026

Sheinbaum has said Mexico welcomes intelligence sharing and law-enforcement cooperation but doesn’t permit direct U.S. involvement in operations on Mexican soil.

From The Wall Street Journal • Jun. 6, 2026

Nor would I publish the story without the full cooperation and approval of Mrs. Lakes’ family.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot

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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