Nouns ending in -a (often Latin or scientific) add -e to form the plural.
Ninja is regular. It follows the -ae Addition rule.
Use plural verbs: "The ninjae are ready" (not "is ready").
Yes. The plural ninjae is standard across all English variants.
The word ninja follows the standard English pluralization rule. When forming the plural, ninja becomes ninjae. This follows the -ae Addition pattern, which is one of the most common plural rules in English.
Understanding why ninja becomes ninjae helps with spelling and pronunciation. Nouns ending in -a (often Latin or scientific) add -e to form the plural.
When using ninjae in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The ninjae are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.