Here is the full list of all 14 Scrabble achievements worth 1,000 gamerscore. It takes around 1-2 hours to unlock all of the achievements on Xbox One.
Beat the Hard AI.
Use an Emoji in Multiplayer.
Spell the word "SCRABBLE" on board.
Score over 325 points in any mode.
Score a Bingo.
Score over 50 points in one turn.
Win 5 matches in Quick Play.
Score over 225 points in any mode.
Make a word in the last 5 seconds remaining in your turn in any mode.
Beat 3 Very Hard AI in one match.
Use at least 2 types of Premium Squares in one turn.
Complete one match in any mode.
Beat the Very Easy AI.
Spell at least two words in a turn.