Longest Russian word?
I came across this word today: сельскохозяйственные. I think it means "agricultural". It has 20 letters!! Is there a longer Russian word? Just curious!????

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частнопредпринимательский - 25 letters; 
человеконенавистничество and высокопревосходительство - 24 letters;
одиннадцатиклассница and делопроизводительница - 23 letters;
the poor grade at school is called неудовлетворительно - 19 letters.

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Почему-то в ум приходит никотинамидадениндинуклеотидфосфат (НАДФ) - 34 буквы

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it is two words in one . сельский и хозяйственный .

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Lots of them! I think it could successfully compete with German in this area. LOL.
Here are some articles on the subject:

1. http://www.russisch-fuer-kinder.de/de_start/ueber_alles/lesetexte.php?lesen=lange_woerter

2. http://orfogrammka.ru/%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%B5%D1%81%D0%BD%D0%B0%D1%8F_%D1%84%D0%B8%D0%BB%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F/%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%B5%D1%81%D0%BD%D1%8B%D0%B5_%D1%81%D0%BB%D0%BE%D0%B2%D0%B0_%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%B3%D0%BE_%D1%8F%D0%B7%D1%8B%D0%BA%D0%B0/

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we can combine words together sometimes and make very long words)
for example: гладкий ствол(about guns), so we may say(гладкОствольный), words are combined with "O" and sometimes with "O-". космический десантник - космОдесантник. железные и бетонные двери(at the same time)- железОбетонные. дизоксирибонуклеиновая кислота(DNA). 
маслОохладитель-кристаллизатор  - 3 words in one:D
crazy russians, isn't it?)