One must tread very carefully with this one. There are certain words that start with the letter C that…well, perhaps it’s best to not go there..
Personally, I’m fond of the word cocophany. It’s defined as a harsh discordance or dissonance of sound. Airports are usually cocophanous places. I also like how the word has the word “cough” in it, sort of. The phrase “cocophany of coughs” occured to me during an exam in one of my English lessons the other day. There’s a cold bug going around the school and several students and teachers have been out sick. At the time, the otherwise quiet classroom sounded like a tuberculosis isolation ward.