Brain wave and Or

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

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

Or noun - A room in a hospital equipped for the performance of surgical operations.

Brain wave and or are semantically related. Sometimes you can use "Brain wave" instead a noun "Or".