Odor :  (noun)
1: any property detected by the olfactory system [syn: olfactory property, smell, aroma, odour, scent]
2: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form; "she loved the smell of roses" [syn: smell, odour, olfactory sensation, olfactory perception]

air, aroma, atmosphere, attribute, aura, badge, balminess, bouquet, brand, breath, cachet, cast, character, characteristic, configuration, cut, differentia, differential, distinctive feature, earmark, feature, fetor, figure, flavor, fragrance, fragrancy, fruitiness, gust, hallmark, hint, idiocrasy, idiosyncrasy, impress, impression, incense, index, individualism, keynote, lineaments, mannerism, mark, marking, mold, muskiness, nature, nosegay, particularity, peculiarity, perfume, property, quality, quirk, redolence, savor, scent, seal, shape, singularity, smack, smell, specialty, spice, spiciness, spirit, stamp, stench, stink, suggestion, sweet savor, sweet smell, taint, tang, taste, token, tone, trait, trick,