olfaction vs sense of smell

olfaction and sense of smell both are nouns.

Word	Noun	Adjective	Verb	Adverb
olfaction	Yes	No	No	No
sense of smell	Yes	No	No	No

As nouns, olfaction and sense of smell are synonyms defined as:

olfaction and sense of smell: the faculty that enables us to distinguish scents

Other synonyms of olfaction include olfactory modality, smell.

olfaction (noun)	sense of smell (noun)
the faculty that enables us to distinguish scents	the faculty that enables us to distinguish scents