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 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

Dr. Clarke said the findings highlight a level of planning and cooperation that may have been greater than previously recognized.

From Science Daily • Jun. 9, 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

“It took us decades of cooperation to get here and to disentangle all these things is really, really difficult,” said Gaurav Ganguly, head of international economics at Moody’s Analytics in London.

From The Wall Street Journal • Jun. 7, 2026

These were Orgota, people trained from birth in a discipline of cooperation, obedience, submission to a group purpose ordered from above.

From "The Left Hand of Darkness" by Ursula K. Le Guin

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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