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