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