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