orthodontics vs orthodonture

orthodontics and orthodonture both are nouns.

Word	Noun	Adjective	Verb	Adverb
orthodontics	Yes	No	No	No
orthodonture	Yes	No	No	No

As nouns, orthodontics and orthodonture are synonyms defined as:

orthodontics and orthodonture: the branch of dentistry dealing with the prevention or correction of irregularities of the teeth

Other synonyms of orthodontics include dental orthopaedics, dental orthopedics, orthodontia.

orthodontics (noun)	orthodonture (noun)
the branch of dentistry dealing with the prevention or correction of irregularities of the teeth	the branch of dentistry dealing with the prevention or correction of irregularities of the teeth