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