Articles of Faith (Four of Spades)

Hints & Solutions
Highlight the white text inside the block for hints ranging from vague to specific...

Starting Hint:

Look at the starting and ending letters that are uncommon or unshared. Such words will not fit into spaces where they have to meet the first/last letter with another word. Attemping to discover where these words would have to be placed is a good starting point.

Hint 1: The upper left corner is an O.

Hint 2: The lower left corner is an A

Hint 3: The upper right corner is an H

Hint 4: The word that is not used is 6-letters long.

Hint 5: SATURN and CRONOS cross in the center. Guess there is a cross-over between those two pantheons there...

The Solution: The keyword is HELIOS