olfaction vs modality

olfaction and modality both are nouns.

Word	Noun	Adjective	Verb	Adverb
olfaction	Yes	No	No	No
modality	Yes	No	No	No

As nouns, modality is a hypernym of olfaction; that is, modality is a word with a broader meaning than olfaction:

Other hypernyms of olfaction include sense modality, sensory system, exteroception.

olfaction (noun)	modality (noun)
the faculty that enables us to distinguish scents	a method of therapy that involves physical or electrical therapeutic treatment
	a particular sense
	a classification of propositions on the basis of whether they claim necessity or possibility or impossibility
	verb inflections that express how the action or state is conceived by the speaker