paladian,
Sorry to jump into a discussion, but I believe just finding a similar word and trying to make it mean the same thing as the Romans passage is a sure way to failure. I’m sure you must know this.
In the first passage in Romans, God, inspiring Paul by the Holy Spirit, details in the most complete way possible that there are none righteous. Zero. Nor is the Law a way to righteousness. The whole world is included in his description.
You contrasted this with Noah and the brief snippet that he is referred to as righteous. Finding the same word used is just the surface, but tells you no more.
In the case of Noah, Scripture clearly tells us why he was righteous:
Hebrews 11:7
“By faith Noah, being warned by God about things not yet seen, in reverence prepared an ark for the salvation of his household, by which he condemned the world, and became an heir of the righteousness which is according to faith.”
To go through every one of your passages is ultimately interesting, but not fit for a forum discussion... Especially in light of the universal condemnation of all men apart from the righteousness of Christ.
Which is the same and only reason any human is ever righteous.
Best.
Well said!