scent vs odor

scent and odor both are nouns.

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

As nouns, scent and odor are synonyms defined as:

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

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

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

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

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

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

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

scent (noun)	odor (noun)
any property detected by the olfactory system	any property detected by the olfactory system
an odor left in passing by which a person or animal can be traced	the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form
a distinctive odor that is pleasant