Then there's 'antidisestablishmentarianism' at 28 letters, meaning 'opposition to the disestablishment of the Church of England'. It is often considered the longest word as it has an actual meaning instead of being created just to be long.
Even longer still is 'Hippopotomonstrosesquippedaliophobia', at 36 characters, it is the fear of long words. They should have made it shorter.
Unofficially the longest word is 'pneumonoultramicroscopicsilicovolcanoconiosis' at 45 characters, meaning 'a lung disease'. It was created solely for the purpose of being the longest word, however, it does appear in a few dictionaries.
The longest place name is that of a hill in New Zealand at 85 characters:
