Faced with similar issues, I maintain a python library called python-usernames[1] with list of closed to 400 reserved words[2].

Publishing this as a library helps a lot collecting the wordlist over time and be able to use the same list in all my projects.

[1] https://github.com/theskumar/python-usernames

[2] https://github.com/theskumar/python-usernames/blob/master/us...