What's the plural form of proficience? Here's the word you're looking for.
Answer
The noun proficience can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be proficience.
However, in more specific contexts, the plural form can also be proficiences e.g. in reference to various types of proficiences
or a collection of proficiences.
Examples
Francis Bacon, Of the Proficience and Advancement of Learning, I, vi.
The Bengalese have from the earliest times been noted for their proficience in the arts.
