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