What is a word with another put in the middle called?

This is a bit of a tricky question! There isn't a specific word for a word with "another" inserted in the middle. However, it could be described as:

* A neologism (a newly coined word)

* A portmanteau (a word blending two or more words)

* A humorous wordplay or punning

* An example of linguistic creativity

It's not a common practice to insert "another" into the middle of a word in standard English. If you have a specific example in mind, I might be able to help you understand it better.