stank vs odour

stank and odour both are nouns.

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

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

stank: A smell of genitals or sex
odour: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form

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

stank (noun)	odour (noun)
A smell of genitals or sex	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