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