dyslogia vs defect of speech

dyslogia and defect of speech both are nouns.

Word	Noun	Adjective	Verb	Adverb
dyslogia	Yes	No	No	No
defect of speech	Yes	No	No	No

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

dyslogia: impaired ability to express ideas verbally; usually resulting from difficulties of reasoning (as in feeblemindedness or certain psychoses)
defect of speech: a disorder of oral speech

Other hypernyms of dyslogia include speech defect, speech disorder.

dyslogia (noun)	defect of speech (noun)
impaired ability to express ideas verbally; usually resulting from difficulties of reasoning (as in feeblemindedness or certain psychoses)	a disorder of oral speech