odor vs scent

odor and scent both are nouns.

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

As nouns, odor and scent are synonyms defined as:

Other synonyms of odor include aroma, odour, olfactory property, smell.

As nouns, scent is a hyponym of odor; that is, scent is a word with a more specific, narrower meaning than odor:

odor: the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form
scent: an odor left in passing by which a person or animal can be traced

Other hyponyms of odor include aroma, fragrance, perfume, fetor, foetor, malodor, malodour, mephitis, reek, stench, stink, acridity, stank.

odor (noun)	scent (noun)
any property detected by the olfactory system	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	an odor left in passing by which a person or animal can be traced
	a distinctive odor that is pleasant