dentistry vs odontology

dentistry and odontology both are nouns.

Word	Noun	Adjective	Verb	Adverb
dentistry	Yes	No	No	No
odontology	Yes	No	No	No

As nouns, dentistry and odontology are synonyms defined as:

dentistry and odontology: the branch of medicine dealing with the anatomy and development and diseases of the teeth

Other synonyms of dentistry include dental medicine.

dentistry (noun)	odontology (noun)
the branch of medicine dealing with the anatomy and development and diseases of the teeth	the branch of medicine dealing with the anatomy and development and diseases of the teeth