Retrognathism is a synonym of retrognathia.
As nouns the difference between retrognathism and retrognathia
is that retrognathism is (anatomy) the quality of being retrognathic while retrognathia is a malocclusion in which the maxilla or mandible is further posterior than would be expected.
retrognathism
English
Noun
(-)
(anatomy) The quality of being retrognathic.
retrognathia
English
Noun
(
-)
(
wikipedia retrognathia)
A malocclusion in which the maxilla or mandible is further posterior than would be expected.
Synonyms
* retrognathism