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