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