Webster's World is an artificial planet that is often used as neutral territory for diplomatic discussions and trade negotiation by the interstellar powers of the Looniverse. It is the home of Spelling Boy. Its superhuman guardians are the Supermoderators, including the LNHer Slasher.
<add stuff from FWIV etc>
It is based on the Weber's World from the 30th Century of the Legion of Superheroes, one of the few instances of direct LSH parody in the LNH.
- Spelling Boy is probably one too but this hasn't been established in story yet so *shrug emoji*