The Collaborative International Dictionary of English v.0.48:
gobbledegook \gobbledegook\, gobbledygook \gobbledygook\n.
The incomprehensible or pompous jargon of specialists; as,
psychoanalytic gobbledygook.
[WordNet 1.5]
Moby Thesaurus II by Grady Ward, 1.0:
32 Moby Thesaurus words for "gobbledegook":
balderdash, bosh, bull, bullshit, bunk, circumlocution, crap,
deception, deceptiveness, double-talk, drivel, equivocation,
eyewash, garbage, gibberish, gobbledygook, hogwash, humbug, jargon,
malarkey, moonshine, mumbo-jumbo, nonsense, obfuscation,
obscurantism, piffle, poppycock, quibbling, rot, rubbish,
shiftiness, vagueness