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