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