fetor vs odour

fetor and odour both are nouns.

Word	Noun	Adjective	Verb	Adverb
fetor	Yes	No	No	No
odour	Yes	No	No	No

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

fetor: a distinctive odor that is offensively unpleasant
odour: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form

Other hypernyms of fetor include odor, olfactory perception, olfactory sensation, smell.

fetor (noun)	odour (noun)
a distinctive odor that is offensively unpleasant	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