@Timus: I think 8 letters is quite enough. I am not a native speaker either :-)

@barzam: Actually, you found an old list, the current one is:
https://raw.github.com/Slocan/Wordsl.../wordlist2.txt
I've found similar issues with it than the ones you reported, but haven't yet found a better one.
As for license, I guess it would be under the GPL... This stuff makes my head hurt