acridity vs olfactory sensation

acridity and olfactory sensation both are nouns.

Word	Noun	Adjective	Verb	Adverb
acridity	Yes	No	No	No
olfactory sensation	Yes	No	No	No

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

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

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

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