"Workplace" (aka office) is a word that i can't find .... well, I guess elves don't have a specific place for their labour...
Celedethor suggests this one: Bar-e-Vudad
I agree with it... but I am also looking for an alternative...and have found "market-place" in the dictionary "bach+sad" -> bahad, so I am thinking ... how about this: mudad+sad (work+place) -> mudahad???
Just had a closer look at that list. It comes from the BNC, so this is the 1000 most commonly spoken words - this won't actually work into Sindarin after all as a lot of these words are simply too modern to exist (radio) or are dialectal (bloke) or are place names (America, Britain).