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