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