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