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