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