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