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.
Reach the Max Level
Beat All Levels
Earn 500,000 Gold
Defeat Typhon
Beat All Typing Levels
Save 10 Followers
Defeat the Minotaur
Defeat Echidna
Defeat Lamia
Defeat Lycaon
Kill an enemy with exact damage
Defeat Arachne
Defeat the Cyclops
Defeat the Hydra
Defeat 100 Normal Enemies
Max out an ability
Defeat the Chimera
Use 10,000 Letters
Spell 2,500 Words
Defeat the Manticore
Defeat Ladon
Unlock 5 Treasure Chests
Defeat the Calydonian Boar
Defeat the Nemean Lion
Defeat the Sphinx
Spell a 7 Letter Word
Defeat Cerberus
Spell a word with 3 or more Special Tiles
Defeat Medusa
Save a follower with no incorrect guesses