Nickname, Nicknames, Username, Usernames

Is there a way to restrict certain words being used in the creation of usernames?

For example, so that usernames don't include the community's name or words like: admin, support etc?

you can try http://www.boonex.com/m/NickName_Restriction_2010_01_18

I have it on a site and works fine but make sure you backup all files while testing.

Do you have it on 7.1.4 ?

Yes, but its very basic/limited.  http://www.boonex.com/forums/topic/Lock-User-Names.htm