Here is the full list of all 22 Anagrams achievements.
Score 10,000,000 points in Classic mode
Solve 100 anagrams
Solve 100 puzzles
Play Zen mode for 1 hour
Play a puzzle & solve an anagram in Zen mode
Unlock all three game modes
Unlock Zen mode
Play a puzzle & solve an anagram in Free mode
Unlock Free mode
Unlock Blitz mode
Solve 10 anagrams
Solve 10 puzzles
Unlock your first category in Classic mode
Finish all the categories in Classic mode
Unlock all the categories in Classic mode
Solve 1000 anagrams
Solve 1000 puzzles
Last 5 minutes in Blitz mode
Last 10 minutes in Blitz mode
Last 15 minutes in Blitz mode
Solve ALL the anagrams in Blitz mode in ONE round
Solve an anagram in 5 seconds or less