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