Brain wave and Breakthrough

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

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

Breakthrough noun - An instance of notable progress in the development of knowledge, technology, or skill.

Brain wave and breakthrough are semantically related. Sometimes you can use "Brain wave" instead a noun "Breakthrough".