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