Here is the full list of all 30 God of Word achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Beat All Levels
Defeat Typhon
Beat All Typing Levels
Defeat Echidna
Defeat the Minotaur
Defeat Lamia
Defeat Lycaon
Defeat Arachne
Defeat the Cyclops
Defeat the Chimera
Defeat the Hydra
Use 10,000 Letters
Save 10 Followers
Spell 2,500 Words
Defeat 100 Normal Enemies
Defeat the Manticore
Defeat Ladon
Unlock 5 Treasure Chests
Defeat the Calydonian Boar
Kill an enemy with exact damage
Max out an ability
Defeat the Nemean Lion
Defeat the Sphinx
Defeat Cerberus
Defeat Medusa
Spell a 7 Letter Word
Spell a word with 3 or more Special Tiles
Reach the Max Level
Save a follower with no incorrect guesses
Earn 500,000 Gold