odour vs sense datum

odour and sense datum both are nouns.

Word	Noun	Adjective	Verb	Adverb
odour	Yes	No	No	No
sense datum	Yes	No	No	No

As nouns, sense datum is a hypernym of odour; that is, sense datum is a word with a broader meaning than odour:

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

Other hypernyms of odour include aesthesis, esthesis, sensation, sense experience, sense impression.

odour (noun)	sense datum (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