How to Say "cooperation" in Spanish
The Spanish word for “cooperation” is “cooperación” — B1 level. This is a very common word in everyday Spanish.

Examples
La cooperación entre los equipos fue esencial para ganar el torneo.
The cooperation between the teams was essential to win the tournament.
Se necesita la cooperación de todos los ciudadanos para mantener la ciudad limpia.
The cooperation of all citizens is needed to keep the city clean.
El país firmó un acuerdo de cooperación económica con sus vecinos.
The country signed an economic cooperation agreement with its neighbors.
Always Feminine
Even though it ends in '-ción', which is a common noun ending, remember that 'cooperación' always uses the feminine article: 'la cooperación'.
Working With Others
When talking about cooperating with someone, use the preposition 'con': 'cooperación con el gobierno' (cooperation with the government).
Mixing up the Noun and Verb
Mistake: “Using 'cooperar' when you mean the noun 'cooperación'.”
Correction: The noun is 'cooperación' (the act itself). The verb is 'cooperar' (to cooperate). Use 'Hay mucha cooperación' (noun) instead of 'Hay mucho cooperar'.
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