fragrance vs odour

fragrance and odour both are nouns.

Word	Noun	Adjective	Verb	Adverb
fragrance	Yes	No	No	No
odour	Yes	No	No	No

As nouns, odour is a hypernym of fragrance; that is, odour is a word with a broader meaning than fragrance:

Other hypernyms of fragrance include aroma, odor, olfactory property, scent, smell.

As nouns, odour is a hypernym of fragrance; that is, odour is a word with a broader meaning than fragrance:

fragrance: a distinctive odor that is pleasant
odour: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form

Other hypernyms of fragrance include odor, olfactory perception, olfactory sensation, smell.

fragrance (noun)	odour (noun)
a pleasingly sweet olfactory property	any property detected by the olfactory system
a distinctive odor that is pleasant	the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form