I'm going to say no to this one, sorry. As I think you are aware, we aren't really supposed to take suggestions for new words via this forum. I will often make an exception for compounds, but in this case, I don't imagine it's something users are crying out for (I had to Google what a pond yacht is. I'd have called it a toy boat. I suspect many native speakers share my ignorance ). Of course, if you have searched for it, it will get picked up in our standard review of user search terms, and someone may decide to add it at that point. There is always hope.