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