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