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