I don't find this remotely compelling, I can easily come up with clues that make sense to me to connect a ton of words the difficulty is coming up with clues that others will look at the same way. The last example is exactly what I mean, "paper" makes sense for those 4 only when you explain it. If "Line" counts then why not "Gum" (which is typically wrapped in paper) or if "Lawyer" is valid then why not "King" (who's decrees are written on what?).