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