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