Wordsmithery Persistency Achievement
Win 10 games.
These achievements require you to win a total of 10 games. This is easy considering that you get a win when the other player resigns. Just quickly invite your main account to ten games with your secondary one. Then, with the secondary profile, click Resign (X in bottom right corner) before even placing a letter. Now, with your main profile, go into your Played Games screen and the achievement will pop. This method will also pop the "Not Bamboozled" achievement for winning 5 games in a row, as long as you didnt lose any games in-between.