What is a Casino Word™?

Question

_{This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.}

---

If a word conforms to a special rule, I call it a Casino Word™.
Use the following examples below to find the rule.

Casino Words™	Not Casino Words™
SUCCESS	FAIL
GRACE	FAVOUR
SWAY	STAND
ARGUE	DISPUTE
ZOOM	ADJUST
RUSSIAN	AMERICAN
OFF	ON
PRICELESS	WORTHLESS
UGLY	BEAUTIFUL
LINEAR	NONLINEAR

And, if you want to analyze, here is a CSV version:

Casino Words™,Not Casino Words™
SUCCESS,FAIL
GRACE,FAVOUR
SWAY,STAND
ARGUE,DISPUTE
ZOOM,ADJUST
RUSSIAN,AMERICAN
OFF,ON
PRICELESS,WORTHLESS
UGLY,BEAUTIFUL
LINEAR,NONLINEAR

Answer 1

I think a Casino Word has the property that

If we convert each letter to its corresponding position in the alphabet (A=1, B=2,..., Z=26) then a Casino word consists entirely of red Roulette numbers or entirely of black Roulette numbers.

Examples

$SUCCESS \rightarrow (19,21,3,3,5,19,19)$.
All of the numbers in brackets are red Roulette numbers. Hence, this is a Casino Word.
$ZOOM \rightarrow (26, 15, 15, 13)$
All of the numbers in brackets are black Roulette numbers. Hence, this is a Casino Word.
$STAND \rightarrow (19,20,1,14,4)$
This word contains a mix of red and black numbers, hence is not a Casino Word