It was shadow! I was hoping you would consider it the opposite/absence of light and take the 0 that way. I was also hoping to eliminate stuff like Paris (which is a noisy place, so maybe you were thinking about it for Cacophony) and Cross (the assassin). I realized afterwards that you might reasonably associate Lights and Shadow instead and kicked myself for that, sorry.
Cacophony was for Racket. They are synonyms. It actually appears if you look up the definition on Google.
I do wish you had guessed instead of passed on the second to last turn, because I was lost on what useful clue to provide, everything was so different. Now I think maybe I could have done something like Mafia: 2 to get shadow and racket, but that uses a more obscure definition of racket and might hit on Cross...
Ah well, good game!