There is a limitless number of puns in Esperanto.

The reason is that we can introduce new roots in Esperanto (see the rule 15 of the Fundamento). So every new root that is long enough can be read as a combination of others old roots (see the rule 11). Also, every old root can be seen as a combination of newer roots. And almost everything in Esperanto is a root.

One exemple is vegetaran-o, which can be read as "v-eg-et-ar-an-o", which is a member of a group of small big Vs, which is maybe just the letter V.

"Do you know any othen pun words?" Yes, I know many, too many. There are some people in Twitter who often post bad puns.