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ok but i promise i'll only PUNish you once a day ! ooooops sorry !
Oh dear, all these chemical and baffling words - do they really count?
I'd say even the most children know the longest English word, it's so easy:

"Supercalifragilisticexpialidocious" (34 letters!)

That's incontestable, isn't it?
What do you think? Emotion: smile
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It might be 'supercalifragilisticexpialidocious' (which appears in the Oxford English Dictionary), unless you want to count names of diseases (such as 'pneumonoultramicroscopicsilicovolcanoconiosis', defined by the OED as "a factitious word alleged to mean 'a lung disease caused by the inhalation of very fine silica dust' but occurring chiefly as an instance of a very long word"), places (such as 'Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch', a village in Wales; see the Web site, which has an audio pronunciation of the word), chemical compounds (apparently there is one that is 1,913 letters long), and also a few words found only in Joyce's Finnegans Wake.

Other words famous for being sesquipedalian:

antidisestablishmentarianism ("opposition to the disestablishment of the Church of England")
floccinaucinihilipilification
honorificabilitudinitatibus (Which appears in Shakespeare's Love's Labour's Lost, and which has been cited as [dubious] evidence that Francis Bacon wrote Shakespeare's plays)
Or perhaps smiles is the longest word, because there's a mile between the first letter and the last
Here is couple of examples which you might want to use the weird word

I loved him for nothing so much as his floccinaucinihilipilification of money.

They must be taken with an air of contempt, a floccinaucinihilipilification of all that can gratify the outward man.

*It was shock to all who were thinking him a floccinaucinihilipilification
*It proved theire floccinaucinihilipilification about him was worng

*I doubt these sentences, I tried it by my own

Ha haaaaa
Its an award winning stunt. Wasnt it?
Lolz Lolz
that's sick......

Dichlorodyphanel

oops some like that...dunno

Ok there is a kind of game.. right?

Hydrodynamics is the longest word in the world, those who can't spell it are the most stupest people.
well not exactly, I don't reckon This a long word. Emotion: stick out tongueEmotion: smile Emotion: stick out tongue Emotion: stick out tongue
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I thought the longest word was "smiles" because there's a mile between the two esses! [H]
The longest word is pneumonoultramicroscopicsilicovolcanoconiosis which has 45 letters. It's a disease that miners in Africa came down with from getting silicon slivers in their lungs.
You can find such long words more if you search little hard,
They all are names of diseases. But we should find some lenghty words which can be used to express something. Not to say a name of dieses or some medicine name.
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LOL. That was a good one Andrew (ALT).
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