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