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