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