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