Today is my 40th birthday and I will be celebrating by sharing a puzzle with you all. I recently stumbled upon an abstruse image, and apparently the words in main body of the image all have something in common; I think you have to figure out what exactly Π is.
Edit: Removed 'SHIP' from Π and corrected it with 'KINSHIP' (thanks to @hexomino for spotting this).
I have attacked the word list with the usual ciphers, but to no avail. The image was in a collection of seemingly unrelated pictures; maybe they'll be of use to you?
Word list in text form:
GOD, ADVANCED, LAW, GLOW, HYMNED, OXIDATED, SHIP, REDHEAD, PERP, SOW, UNWORSHIP, LONGBOW, DAWNED, DEATHBED
N.B. It is not my birthday and I am not 40 years old, I simply added this to create a narrative. I wonder why I chose the age of 40 in particular?
Hint:
The answer to the riddle below will give you a similar clue to Image 2. The background, crown, etc., are all important.
Another subset of Π
{AUDIBLE, JESUS, GLORY, ZAX, A} ⊂ Π
Hint 2: This hint provides a similar answer to Hint 1 but is less cryptic.
What do the words "homo", "cell", "mega", and "micro" have in common?