Is there any specific rule which forbids the same suffix applied twice in a row?
Context: I've randomly tried to imagine what programming variables would be called in Esperanto and realized that "workshopFactory" is technically laborejejo, since it's a place where places for working reside.
So I tried creating more -- I've thought that you could jokingly say that you're laboremema, meaning you're eager to be eager to get working on something, in a sense that you're lazy. In a similar way you can go overboard with -aĉ-, like hundaĉaĉo.
I have a feeling that -ar- (along with my original -ej-) might be the easiest to imagine, like a group of forests in close proximity could be arbararo, but they still keep looking fabricated to me.
I couldn't come up with something more concrete and common, so I'm also wondering: are there common words which use this pattern?