Dysarthria and Speech defect

Dysarthria noun - Impaired articulatory ability resulting from defects in the peripheral motor nerves or in the speech musculature.

Speech defect and dysarthria are semantically related. In some cases you can use "Speech defect" instead a noun "Dysarthria".

Speech defect noun - A disorder of oral speech.

Dysarthria and speech defect are semantically related. Sometimes you can replace term "Dysarthria" with "Speech defect", this terms are similar.