here are some long words:
pneumonoultramicrospopicsilicovolcanoconiosis
electrophotomicrographically
tetramethyldiaminobenzhydrylphosphinous acid
hepaticocholangiocholecystenterostomies
formaldehydetetramethylamidofluorimum
dimethylamidophenyldimethylpyrazolone
Supercalafajalistickespialadojus
Supercalafajalistickespeealadojus
Supercalifragilisticexpialidocious
dichlorodiphenyltrichloroethane
pseudopseudohypoparathyroidism
floccinaucinihilipilification
antifloccinaucinihilipilification
trinitrophenylmethylntramine
antidisestablishmentarianism
paradimethylaminobenzaldehyde
honorificabilitudinitatibus
electroencephalographically
ethylenediaminetetraacetate
antitransubstantiationalist
this enough words?
also
www.Iamtheproudownerofthelongestlongestlongestdomainnameinthisworld.com is what it says and
http://members.aol.com/gulfhigh2/words11.html had some more words in case you want to speak in jibberish some more