Is sometimes a plural?
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Is there a plural form of sister that would be appropriate to use with the plural form brethren?
Asked in Care of Mice and Rats, Mice and Rats, Pronouns
Why do you say mice and not mouses?
Asked in Plural Nouns
Plural form of illiterate?
Illiterate is usually an adjective, and in this sense does not have a plural form. The noun for illiterate is illiteracy, for which the plural can be illiteracies, but it is awkward. Illiterate is sometimes used as a noun to describe an illiterate person, in which case the plural would be illiterates, e.g. as in the insult, "You are a bunch of illiterates!"