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