Recently, Darryl Francis found words from the letter banks of the chemical elements and the states of the US. I decided to letter-bank (to coin a verb) the names of the nations of the world, but I found that, on average, their capitals had shorter names that their countries. I used a Scrabble-based (North American vocabulary only) program similar to LeXpert to letter-bank the national capitals.
"Letter Banks of the Capitals,"
Word Ways: Vol. 37
, Article 13.
Available at: https://digitalcommons.butler.edu/wordways/vol37/iss4/13