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