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