precede
Precede, exceed, concede, intercede, recede, secede, and accede are the first seven that come to mind. Cede on its own is also a word.
No. "So" is an Enlgish word, "so so" is a phrase using the same word twice which refers to something being reasonable, or not bad but not great. "You went to the football yesterday, how was...
the Russian word for so is tak.
It is the longest word ever because there is a mile between the 's' and the 'e' in the word.