Devotion is a related term of righteousness.
As nouns the difference between devotion and righteousness
is that
devotion is religious devotion while
righteousness is (uncountable) the quality or state of being righteous; holiness; purity; uprightness; rectitude righteousness, as used in scripture and theology, in which it chiefly occurs, is nearly equivalent to holiness, comprehending holy principles and affections of heart, and conformity of life to the divine law.