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