Rush Tactics (Guild)

or

Rushtactics (Player)


I tried to make this name and then this guild...both times said name is invalid or inappropriate.
Anyone want to shed light on this? Like is there a bad word in there from another language?
I'm posting here instead of messaging support because to be hones I don't expect a reply on something so trivial, they have much more important things to work on via support.

Maybe a forum dev can help with this? Thanks.