I took a few organic chemistry classes in college, and I can see how that word can be real. You may notice the same "word" repeating over and over again, but it's actually a description of the bond in that molecule. Since it's describing -each- bond between the groups (exceptions not included), and the same type of bond repeats in the molecule, the word will repeat in the name.
I absolutely HATED organic chemistry nomenclature!!!
Edit: I looked it up on wikipedia. Here's the chemical formula:
C(132983)H(211861)N(36149)O(40883)S(693)
Wow. A quote from its entry:
As the largest known protein, titin also has the longest IUPAC name. The full chemical name, containing 189,819 letters, is sometimes stated to be the longest word in the English language. However, professional dictionary writers regard generic names of chemical compounds as verbal formulae rather than as English words.
I think that last part sums it up quite nicely.