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