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