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