Add Webster's Unabridged Dictionary

Source https://github.com/matthewreagan/WebstersEnglishDictionary

Processed with:
$ cat WebstersEnglishDictionary.txt | sed "s/\r//g" | grep -E '^[A-Z; -]{1,}$' | sed 's/; /\n/g' | sed 's/[A-Z]/\L&/g' | sed 's/-//g' | sort -u > webster.txt

Author: Bronek