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