There's also the niche use case of vertically arranged English letters — you see this once in a while on signage, but my favorite example is from _Street Fighter 3,_ where the character DeeJay has pants with "MAXIMUM" written down the leg, which means that you can flip the sprite (i.e. to have the character face left or right) and the word stays intact.
There's an Swedish fantasy role playing game/novel[0] in which there's a city called HOXOH (all uppercase). It's also known as the "City of Illusions" and home to the magical Academy of Illusionists (who are often practicing their art in the streets). It was given its name partly due to the fact that the word could be read and mirrored in any direction without becoming distorted/assymetric.
[0] The RPG is called Drakar och Demoner (Dragons and Demons) and is roughly the Swedish equivalent of D&D, though it's actually based on the BRPG rules. The supplement that introduced HOXOH was eventually used as a basis for a series of (quite interesting) fantasy novels written by the very author that originally wrote the RPG supplement.
I don't see how you can allow lowercase "m" and "u" as symmetrical without also by the same principles including "n." In which case there are other words like "nun" and "non." Also "MAM" and "MOM" are symmetrical and are words (at least, Scrabble words. He only includes "MAAM" which oddly enough is not a Scrabble word.)
> He only includes "MAAM" which oddly enough is not a Scrabble word.
What's odd about that? ISNT, DONT, ARENT, COULDNT, SHOULDNT, none of them are Scrabble words. More generally, you're not allowed to misspell words in Scrabble.
I didn't expect to be surprised by this! After thinking about it, it reminds me that game about reading some color names as fast as possible, where the names are painted with another color.
I had to work harder than expected to get this. I interpret the cartoon as distinguishing between meaning and form. Until I read it aloud, I couldn't stop interpreting the strings as
