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.

And pretrial and posttrial diversion programs — where someone undergoes treatment in lieu of incarceration — would also need the cooperation of the court system, which the mayor does not control.

From Los Angeles Times • May 19, 2026

Xi said cooperation between Russia and China had "continuously deepened and solidified", according to Chinese state media.

From Barron's • May 19, 2026

At a press conference in May, Putin said that the two sides were very close to taking "a highly significant step forward in oil and gas cooperation".

From BBC • May 18, 2026

Together, we have the chance to draw on these values to create a future of greater prosperity, cooperation and happiness and peace for our children,” Trump added.

From Los Angeles Times • May 17, 2026

The police did show you the pictures, and they were looking for your cooperation in finding a killer?

From "Monster" by Walter Dean Myers

Vocabulary lists containing cooperation

Ecology - Interdependent Relationships in Ecosystems - Introductory

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Lyndon B. Johnson on "The Great Society" (1964)

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

John F. Kennedy, Inaugural Address, January 20, 1961

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!