cataphasia vs speech defect

cataphasia and speech defect both are nouns.

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

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

cataphasia: a speech disorder in which the same word is repeated several times in succession
speech defect: a disorder of oral speech

Other hypernyms of cataphasia include defect of speech, speech disorder.

cataphasia (noun)	speech defect (noun)
a speech disorder in which the same word is repeated several times in succession	a disorder of oral speech