Why do first-sound hints help word-finding?
A word's first sound is a doorway to the whole word. When the sound system below your vocabulary is strong, a small phonological cue can trigger full retrieval — which is why cueing hierarchies in speech therapy lean on it.
Isn't sound practice too basic for adults?
No — phonological treatment is standard, evidence-supported adult aphasia therapy. Working at the sound level is precision training for word-finding, not a step backward.