acridity vs odour

acridity and odour both are nouns.

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

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

acridity: having an acrid smell
odour: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form

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

acridity (noun)	odour (noun)
extreme bitterness	any property detected by the olfactory system
the quality of being sharply disagreeable in language or tone	the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form
having an acrid smell