The Longest Word in English

Do you know what the longest word in English is? Pneumonoultramicroscopicsilicovolcanoconiosis is the longest word in Oxford English Dictionary. It means "a factitious word alleged to mean 'a lung disease caused by the inhalation of very fine silica dust, causing inflammation in the lungs.'" The whole word itself is 45 letters. It actually just looks like Pneumonia-ultra-microscopic-silicosis-volcano-coniosis? Why do people make these long words that nobody uses? It looks pretty stupid to me how "volcano" and "microscopic" is in it.

The second longest word in the English language is pseudopseudohypoparathyroidism which is an inherited disorder. (I don't know what it does.) You know what? Long words usually are a combination of many words. Psuedo-psuedo-hypoparathyroidism. Hypoparathyroidism is a combination of many things that harm your thyroid. I don't get why science words are sometimes really long or really short. I.e. boron and psuedopsuedohypoparathyroidism.

Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu.
Woahhh...that's a place? It's a hill in New Zealand. Ugh, who names hills? Wikipedia says this long word means The summit where Tamatea, the man with the big knees, the climber of mountains, the land-swallower who travelled about, played his nose flute to his loved one. Haha, nose flute? That's interesting...they blow air out of their nose into an instrument. It has 85 letters in it, and it is ONE of longest names in the world. Some other weird names are Mamungkukumpurangkuntjunya Hill which means "where the devil urinates" and Muckanaghederdauhaulia which means "pig-marsh between two saltwaters".
(I guess the picture was too long and can't post the picture all the way.)
http://upload.wikimedia.org/wikipedia/commons/5/5b/New_Zealand_0577.jpg