What's the plural form of intermigration? Here's the word you're looking for.
Answer
The noun intermigration can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be intermigration.
However, in more specific contexts, the plural form can also be intermigrations e.g. in reference to various types of intermigrations
or a collection of intermigrations.
Examples
This court have determined that the intermigration of slaves was not committed to the jurisdiction or control of Congress.