[zzo38computer]

Although there can be other monads (and stuff other than monads, such as ZipList) that can be made with lists, I think that such a monad would not necessarily be a "list monad". (Your link [1] has several examples of this.) You are right that it does not mean that "a list is a monad" and that your other phrasing is better, but it does not mean that "there isn't a list monad".

[kelseyfrog]

To me "a list monad" often subtly implies "one" list monad. I wasn't very clear, but the point I was trying to make was more along the line of singular vs plural. Thanks for pointing out the discrepancy.