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