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 heads of the Pakistani and Lebanese armed forces agreed to boost cooperation on Tuesday as they met in Pakistan with peace talks over the Middle East war dragging on.

From Barron's • 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

During the two-day summit, Kim is expected to turn Beijing’s vows for cooperation into tangible rewards such as expanding cross-border trade and tourism and further developing border economic zones.

From The Wall Street Journal • Jun. 8, 2026

Since taking office, the Lee Jae Myung administration has worked closely with the U.S. to strengthen and modernize our alliance, expanding cooperation across security, economic resilience, advanced technologies and strategic industries.

From The Wall Street Journal • Jun. 5, 2026

She would quickly subordinate her own desires to those of the family or the community, because she knew cooperation was the only way to survive.

From "Farewell to Manzanar" by Jeanne Houston

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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