Paul Anthony Jones in the Huffington Post:
1. In the 17th century, magpies were nicknamed pie-maggots.
2. The part of a wall between two windows is called the interfenestration.
3. If you were to write out every number name in full (one, two, three, four...), you wouldn't use a single letter B until you reached one billion.
4. The part of your back that you can't quite reach to scratch is called the acnestis.It's derived from the Greek word for “cheese-grater.”
5. A hecatompedon is a building measuring precisely 100ft × 100ft.
6. A growlery is a place you like to retire to when you're unwell or in a bad mood. It was coined by Charles Dickens in Bleak House (1853).
7. There was no word for the color orange in English until about 450 years ago.
8. The infinity sign, ∞, is called a lemniscate. Its name means “decorated with ribbons” in Latin.
9. A Dutch feast is one at which the host gets drunk before his hosts do.
10. Schoolmaster is an anagram of “the classroom.”