OT: echosystem What is the name of a word that is inadvertently created e.g. by a typo, or a slip of the tongue? While I don't believe it applies to the curr

OT: echosystem What is the name of a word that is inadvertently created e.g. by a typo, or a slip of the tongue? While I don't believe it applies to the current context, echosystem is just begging for use in some other contexts.