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