Greek-derived nouns ending in -on change to -a in the plural form.
Cooperation is regular. It follows the Greek -a rule.
Use plural verbs: "The cooperatia are ready" (not "is ready").
Yes. The plural cooperatia is standard across all English variants.
The word cooperation follows the standard English pluralization rule. When forming the plural, cooperation becomes cooperatia. This follows the Greek -a pattern, which is one of the most common plural rules in English.
Understanding why cooperation becomes cooperatia helps with spelling and pronunciation. Greek-derived nouns ending in -on change to -a in the plural form.
When using cooperatia in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The cooperatia are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.