Synonyms for Odor (same or very similar meaning)
WordNet sense 1 (the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form):
smell, odour, olfactory perception, olfactory sensationWordNet sense 2 (any property detected by the olfactory system):
aroma, scent, olfactory propertyFrom the ODE community, based on WordNetadd/edit