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