deformed vs malformed

deformed and malformed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
deformed	No	Yes	No	No
malformed	No	Yes	No	No

As adjectives, deformed and malformed are synonyms defined as:

Other synonyms of deformed include distorted, ill-shapen, misshapen.

deformed (adjective)	malformed (adjective)
so badly formed or out of shape as to be ugly	so badly formed or out of shape as to be ugly