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