Here's another good word that I came across in Neil Gaiman’s American Gods:
There was a whispering noise that began then to run through the hall, a low susurrus that caused Shadow, in his dream, to experience a chilling and inexplicable fear.
I love this word. You hardly need the context to get it -- susurrus sounds like what it is:
- OED: A low soft sound as of whispering or muttering; a whisper; a rustling.
- AHD: The act of whispering; a whisper; a murmur.
- M-W online: A whispering or rustling sound.
Susurrus comes straight from the Latin, meaning "hum, whisper," according to M-W Online.
More Friday on an interesting aside I found while reading about susurrus.