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