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