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