This noun follows the standard English plural rule: simply add -s to the singular form.
Institutionalise is regular. It follows the Standard -s rule.
Use plural verbs: "The institutionalises are ready" (not "is ready").
Yes. The plural institutionalises is standard across all English variants.
The word institutionalise follows the standard English pluralization rule. When forming the plural, institutionalise becomes institutionalises. This follows the Standard -s pattern, which is one of the most common plural rules in English.
Understanding why institutionalise becomes institutionalises helps with spelling and pronunciation. This noun follows the standard English plural rule: simply add -s to the singular form.
When using institutionalises in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The institutionalises are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.