[duney]

The example you used for clever wordplay, "gloominati," is actually considered a portmanteau word. It's the result of combining multiple words to create a new word. (I say this not to be a pedant, but because I learned the term recently and was amused that we actually have a word for it.)

[krick]

Yes, portmanteaus are exactly what I was meaning by "clever wordplay". English isn't my primary language so it's hard to remember the right word sometimes, sorry for that. :)