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