neologism

This Bohemian vocabulary is the hell of rhetoric and the paradise of neologism.

The latter (the word administration used as a verb) is the only instance of neologism I ever observed in Mr. Madison.

In this one ordinary speech seemed to have been insufficient to describe the blotch, and he had to resort to a neologism.

But it observed a very high standard of classical English, a little intolerant of neologism, but not stiff nor jejune.

The locution of which we have made use—passed to the state of—has been condemned as a neologism by M. Royer Collard.