speech defect vs disorder

speech defect and disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
speech defect	Yes	No	No	No
disorder	Yes	No	Yes	No

As nouns, disorder is a hypernym of speech defect; that is, disorder is a word with a broader meaning than speech defect:

speech defect: a disorder of oral speech
disorder: a physical condition in which there is a disturbance of normal functioning

Other hypernyms of speech defect include upset.

speech defect (noun)	disorder (noun)
a disorder of oral speech	a disturbance of the peace or of public order
	a condition in which things are not in their expected places
	a physical condition in which there is a disturbance of normal functioning

speech defect (verb)	disorder (verb)
	bring disorder to
	disturb in mind or make uneasy or cause to be worried or alarmed