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