assibilate assibilation bullet buzz crinkle effervesce effervescence effervescing fizz fizzle fizzling fleet flit fly frication frictional rustling hiss hissing hush hushing lisp rhonchus rustle shush shushing sibilance sibilate sibilation siffle sigmatism siss sissing sizz sizzle sizzling sneeze sneezing sniff sniffle snore snort snuff snuffle speed spit splutter sputter squash squelch squish stave sternutation stertor swish wheeze whirl whisk whisper whistle whistling white noise whiz whoosh zip