Noble Definition: Someone who has high morals and ideals or people who are royalty or who have good breeding. Synonyms: Dignified, Lofty, Eminent, Honorable, Magnificent Antonyms: Ignoble, Mean, Humble, Common, Plebeian

Notion Definition: An idea, belief or vague knowledge of something. Synonyms: Conception, Impression, Imagination, Opinion, Doctrine Antonyms: Truth, Reality, Fact, Variety, Actuality

Numerous Definition: Something that has many elements or that is large in number. Synonyms: Various, Several, Manifold, Sundry, Diverse Antonyms: Few, Scarce, Scanty, Rare

Obdurate Definition: Stubborn or not easily moved to sympathy. Synonyms: Adamant, Dogged, Firm, Fixed, Hard Antonyms: Amenable, Biddable, Complaint, Flexible, Malleable

Obligatory Definition: Necessary, required or expected as a result of law or social custom. Synonyms: Necessary, Unavoidable, Needful, Imperative, Compulsory Antonyms: Desired, Willing, Voluntary, Self, Chosen