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
Kill an enemy with exact damage
Reach the Max Level
Defeat Lycaon
Earn 500,000 Gold
Defeat Lamia
Save 10 Followers
Use 10,000 Letters
Defeat Arachne
Spell 2,500 Words
Defeat the Cyclops
Defeat the Chimera
Defeat the Hydra
Defeat 100 Normal Enemies
Unlock 5 Treasure Chests
Defeat the Manticore
Save a follower with no incorrect guesses
Defeat Ladon
Defeat the Calydonian Boar
Max out an ability
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