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