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