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