odor vs aesthesis

odor and aesthesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
odor	Yes	No	No	No
aesthesis	Yes	No	No	No

As nouns, aesthesis is a hypernym of odor; that is, aesthesis is a word with a broader meaning than odor:

odor: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form
aesthesis: an unelaborated elementary awareness of stimulation

Other hypernyms of odor include esthesis, sensation, sense datum, sense experience, sense impression.

odor (noun)	aesthesis (noun)
any property detected by the olfactory system	an unelaborated elementary awareness of stimulation
the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form