speech defect vs speech disorder

speech defect and speech disorder both are nouns.

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

As nouns, speech defect and speech disorder are synonyms defined as:

Other synonyms of speech defect include defect of speech.

speech defect (noun)	speech disorder (noun)
a disorder of oral speech	a disorder of oral speech