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