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