source: ~The World of a Fujoshi~

MORAL, ETHICAL, VIRTUOUS, RIGHTEOUS, NOBLE mean conforming to a standard of what is right and good.

MORAL implies conformity to established sanctioned codes or accepted notions of right and wrong.

e.g. the basic moral values of a community

ETHICAL may suggest the involvement of more difficult or subtle questions of rightness, fairness, or equity.

e.g. committed to the highest ethical principles

VIRTUOUS implies moral excellence in character.

e.g. not a religious person, but virtuous nevertheless

RIGHTEOUS stresses guiltlessness or blamelessness and often suggests the sanctimonious.

e.g. wished to be righteous before God and the world

NOBLE implies moral eminence and freedom from anything petty, mean, or dubious in conduct and character.

e.g. had the noblest of reasons for seeking office

adjective (nobler, noblest)

1. belonging to a hereditary class with high social or political status; aristocratic:

〖名詞の前で〗身分の高い, 貴族の〈人･家系など〉(aristocratic)

e.g. the Duchess of Kent and other noble ladies.

2. having or showing fine personal qualities or high moral principles and ideals:

〈人･理想･目標･行動などが〉気高い, 高潔な, 崇高な, (倫理的に)立派な

e.g. the promotion of human rights was a noble aspiration.

of imposing or magnificent size or appearance:

〈物などが〉壮麗な, 壮大な; 目を見張るような, 見事な; 非常に美しい

e.g. entering the building with its noble arches and massive granite columns.

of excellent or superior quality.

1. (especially in former times) a person of noble rank or birth.

｟かたく｠ ; 〖通例～s〗 貴族 (!主に封建時代の貴族をさす)

2. historical a former English gold coin.

〘英史〙 ノーブル金貨〘中世に使用〙

nobleness |ˈnōb(ə)lnəs| noun

Middle English: from Old French, from Latin (g)nobilis ‘noted, high-born’, from an Indo-European root shared by know.