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