Full list of all 10 Wordament (Android) achievements worth 50 gamerscore. It takes around 1-2 hours to unlock all of the achievements on Android.
You used rotate to find more words
Completed 10 rounds
You found a digram word
You found a theme word
Beat all your Frenemies in a round
Play Wordament in more than one language
Complete 100 rounds
Place better than 50% of the players in a round
Find the longest possible word in a round
Find words that use all 16 tiles at least once in one round