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