It used to be commonly believed that the longest word in the English language was SUPERDISESTABLISHMENTARIANISM. Disestablishment has to do with getting rid of the established church in England, which is the Church of England. Disestablishmentarianism would refer to the movement to bring this about, or to the belief that it should be brought about. And superdisestablishmentarianism would refer to an individual or institution radically committed to disestablishment. Under the American constitution we do not and cannot have an established church in the United States, so most disestablishmentarians would be found in Britain. No doubt they have disestablishmentarianism in other countries but would have different names for it.
The longest word in the english languageis a word that starts with an m happy searching!