Brain wave and Vibes

Brain wave noun - (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph.

Vibes and brain wave are semantically related. In some cases you can use "Vibes" instead a noun phrase "Brain wave".

Vibes noun - A percussion instrument similar to a xylophone but having metal bars and rotating disks in the resonators that produce a vibrato sound.

Brain wave and vibes are semantically related. Sometimes you can use "Brain wave" instead a noun "Vibes".