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