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