Their shapes look like hieroglyphs on ancient tablets. It is said the two are somehow related.
This is one of only three Neo-era Unown cards whose Pokémon Power's name is not the same as the word associated with that particular Unown in the Unown Dex. (The word associated with Unown N in the games is "Nuzzle".) The other two Unown to share this trait are Unown D and Unown M.