Authorness 

Adj: A word describing how someone is the best writer you have ever seen, even better than a famous one. They can write about anything, even thigns they don't like to write about, and make it sound like the bet thing since white bread.

Dude that girl has a lot of authorness!

Authorness by songstobesung November 8, 2010

authoress 

female writer, female author

that female writer is an authoress

authoress by Veggie Tail July 5, 2009