What's the plural form of preponderancy? Here's the word you're looking for.
Answer
The noun preponderancy can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be preponderancy.
However, in more specific contexts, the plural form can also be preponderancies e.g. in reference to various types of preponderancies
or a collection of preponderancies.
The more I revolve the subject, the more fully I am persuaded that the balance is much more likely to be disturbed by the preponderancy of the last than of the first scale.