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