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