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.

Qatar has signed a cooperation agreement with Ukraine, too.

From The Wall Street Journal • Apr. 12, 2026

"These findings paint a picture of dynamic interactions shaped by both cooperation and competition."

From Science Daily • Apr. 12, 2026

UK-US military and intelligence cooperation will continue, but government sources point to increased British defence spending, a closer relationship with the EU and a push towards energy independence as evidence their wider approach is changing.

From BBC • Apr. 10, 2026

Checker said that the Sahel states have shown an "openness" to resuming security cooperation with the United States but that it would take time as there was a "severe, understandable trust deficit."

From Barron's • Apr. 8, 2026

Will history remember me for my MBE, my British Empire honor for“chivalry,” or for my cooperation with the Gestapo?

From "Code Name Verity" by Elizabeth Wein

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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