origin, root, principle, essence; authentic, genuine, noble

nature, disposition, character, essence, desire, preferences; health

nature, disposition, character, essence, desire, preferences; health

eye, source, well-spring, essence; exact, precisely, exactly

butt, bum, bottom, ass; heart, essence

body, substance

mineral, mineral deposit, inorganic substance

sticky substance, gum, pitch

rust, gangrene, ulcer, corrosive substance (acid etc.)

material, substance, article, affair, subject

human nature

quality, nature

characteristic, nature, property; special, excellent, choice (w/ plural: nobels / upper class people)

character, nature, disposition, habit, attitude

characteristic, feature, specialty, virtue

characteristic

natural character, innate or inborn characteristic

symptom, chance, external characteristic