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