faulty vs defective

faulty and defective both are adjectives.

Word	Noun	Adjective	Verb	Adverb
faulty	No	Yes	No	No
defective	No	Yes	No	No

As adjectives, faulty and defective are synonyms defined as:

faulty (adjective)	defective (adjective)
having a defect	markedly subnormal in structure or function or intelligence or behavior
characterized by errors; not agreeing with a model or not following established rules	having a defect
	not working properly