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