fragrancy vs odor

fragrancy and odor both are nouns.

Word	Noun	Adjective	Verb	Adverb
fragrancy	Yes	No	No	No
odor	Yes	No	No	No

As nouns, odor is a hypernym of fragrancy; that is, odor is a word with a broader meaning than fragrancy:

Other hypernyms of fragrancy include aroma, odour, olfactory property, scent, smell.

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