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.

In recent years however, Japan has moved to obtain "counterstrike" capabilities while hiking military spending and deepening security cooperation with regional allies including the Philippines.

From Barron's • Jun. 24, 2026

IMO secretary-general Arsenio Dominguez said the "large-scale operation" would be carried out in cooperation with Iran, Oman, the US, other coastal states in the region and the maritime industry.

From BBC • Jun. 23, 2026

"The country's tourism industry is increasingly expanding," he said earlier this year, adding that he wanted to develop international cooperation.

From Barron's • Jun. 23, 2026

Sabin saw his opportunity and undertook an unprecedented act of cooperation with Cold War-era Russia.

From The Wall Street Journal • Jun. 21, 2026

Malcolm X was also convinced that the F.B.I. had “bugged” my studio; he probably suspected that it may even have been done with my cooperation.

From "The Autobiography of Malcolm X" by Alex Malcolm X;Hailey

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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