here’s some handy abbrvs. for Peter Norvig’s (via nerdcore) “24 words with length of 20 or more (that are mentioned at least 100,000 times each in the [google books] corpus)”:
electroencephalographic → e21c polytetrafluoroethylene → p21e forschungsgemeinschaft → f20t deinstitutionalization → d20n counterrevolutionaries → c20s dehydroepiandrosterone → d20e electroencephalography → e20y immunoelectrophoresis → i19s institutionalisation → i18n acetylcholinesterase → a18e internationalization → i18n institutionalization → i18n radiopharmaceuticals → r18s electroencephalogram → e18m keratoconjunctivitis → k18s counterrevolutionary → c18y immunohistochemistry → i18y internationalisation → i18n hypercholesterolemia → h18a phosphatidylinositol → p18l compartmentalization → c18n electrophysiological → e18l electrocardiographic → e18c uncharacteristically → u18y
btw these words are utterly useless for scrabble.