Brain drain and Drain away

Brain drain noun - Depletion or loss of intellectual and technical personnel.

Drain away and brain drain are semantically related. In some cases you can replace term "Drain away" with "Brain drain", this terms are similar.

Drain away verb - To grow less in scope or intensity especially gradually.

Brain drain and drain away are semantically related. You can use "Brain drain" instead a noun "Drain away".