olfactory perception vs odour

olfactory perception and odour both are nouns.

Word	Noun	Adjective	Verb	Adverb
olfactory perception	Yes	No	No	No
odour	Yes	No	No	No

As nouns, olfactory perception and odour are synonyms defined as:

olfactory perception and odour: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form

Other synonyms of olfactory perception include odor, olfactory sensation, smell.

olfactory perception (noun)	odour (noun)
the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form	any property detected by the olfactory system
	the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form