Search Result for "sibilate": 
Wordnet 3.0

VERB (4)

1. pronounce with an initial sibilant;

2. utter a sibilant;

3. express or utter with a hiss;
[syn: hiss, sizz, siss, sibilate]

4. make a sharp hissing sound, as if to show disapproval;
[syn: hiss, siss, sizz, sibilate]

The Collaborative International Dictionary of English v.0.48:

Sibilate \Sib"i*late\, v. t. & i. To pronounce with a hissing sound, like that of the letter s; to mark with a character indicating such pronunciation. [1913 Webster]
WordNet (r) 3.0 (2006):

sibilate v 1: pronounce with an initial sibilant 2: utter a sibilant 3: express or utter with a hiss [syn: hiss, sizz, siss, sibilate] 4: make a sharp hissing sound, as if to show disapproval [syn: hiss, siss, sizz, sibilate]
Moby Thesaurus II by Grady Ward, 1.0:

84 Moby Thesaurus words for "sibilate": assibilate, bark, bawl, bellow, blare, blat, blubber, boom, bray, breathe, buzz, cackle, chant, chirp, coo, crow, drawl, effervesce, exclaim, fizz, fizzle, flute, gasp, growl, grunt, hiss, hush, keen, lilt, lisp, mumble, murmur, mutter, pant, pipe, roar, rumble, scream, screech, shriek, shush, sigh, sing, siss, sizz, sizzle, snap, snarl, sneeze, sniff, sniffle, snore, snort, snuff, snuffle, sob, spit, splutter, sputter, squall, squash, squawk, squeal, squelch, squish, swish, thunder, trumpet, twang, wail, warble, wheeze, whine, whish, whisk, whisper, whistle, whiz, whoosh, yap, yawp, yell, yelp, zip