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