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