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