Lexiconian

The Lexiconians are a humanoid species with powers similar to Kryptonians, granted not as many of them, but still.

Biology
They are physically indistinguishable from humans, though not much is known about their inner workings, as there is only one known member still around, WordGirl, and our scientists have yet to get a blood sample from her. Although like Kryptonians, she too has a weakness, Lexiconite (the Lexiconian equivalent to Kryptonite).