What's the plural form of protoracism? Here's the word you're looking for.
Answer
The noun protoracism can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be protoracism.
However, in more specific contexts, the plural form can also be protoracisms e.g. in reference to various types of protoracisms
or a collection of protoracisms.
