stink vs odor

stink and odor both are nouns.

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

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

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

Other hypernyms of stink include odour, olfactory perception, olfactory sensation, smell.

stink (noun)	odor (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

stink (verb)	odor (verb)
smell badly and offensively
be extremely bad in quality or in one's performance