As nouns the difference between malformation and deformation
is that malformation is an abnormal formation while deformation is the act of deforming, or state of being deformed.
malformation
English
Noun
(
en noun)
An abnormal formation.
(teratology) An abnormal developmental feature of offspring.
See also
* (l)
deformation
English
Noun
(
en noun)
The act of deforming, or state of being deformed.
A transformation; change of shape.