olfactory modality vs olfaction

olfactory modality and olfaction both are nouns.

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

As nouns, olfactory modality and olfaction are synonyms defined as:

olfactory modality and olfaction: the faculty that enables us to distinguish scents

Other synonyms of olfactory modality include sense of smell, smell.

olfactory modality (noun)	olfaction (noun)
the faculty that enables us to distinguish scents	the faculty that enables us to distinguish scents