Potable

The water in the Gulf of Mexico (in which I swam today) is not.

Monomania

Not me, not so much.

Shillelagh

Who doesn't like a random Irish word once in a while?! Plus, it's even cooler when you know how to pronounce it correctly.

Balmy

Oh so...

Err

It looks funny.

Dupable

Are you? My students seem to think I am, but I'm not!

Kinder

As in the German word for children. I often say to my students, "Vite, vite kinder!" when I want them to hurry. It means "quick, quick children!" Only, vite is French!