Answer:
"Odor implies a bad scent, while fragrance implies a pleasant scent."
The nuance, or subtle difference between fragrance and odor, is that odor usually has a negative connotation, and fragrance usually has a positive connotation. On perfume, it doesn't say 'odor,' it says 'fragrance.' Deodorant is made to get rid of 'odor,' not 'fragrance.' It's in the name.
I hope this helps
