Search Result for "gibbering": 

The Collaborative International Dictionary of English v.0.48:

gibber \gib"ber\ (g[i^]b"b[~e]r), v. i. [imp. & p. p. gibbered (g[i^]b"b[~e]rd); p. pr. & vb. n. gibbering.] [Akin to jabber, and gabble.] To speak rapidly and inarticulately. --Shak. Syn: jabber. [1913 Webster]
Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "gibbering": blabbering, blabbing, blathering, chattering, drone, droning, gabble, gabbling, gibber, jabber, jabbering, jibber, maundering, mouthing, mumble, mumbling, murmuring, mutter, muttering, prating, prattling, susurration, whisper, whispering