Brain wave and Freethinking

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

Freethinking and brain wave are semantically related. In some cases you can use "Freethinking" instead an adjective phrase "Brain wave".

Freethinking noun - The doctrine that reason is the right basis for regulating conduct.

Brain wave and freethinking are semantically related. Sometimes you can use "Brain wave" instead an adjective "Freethinking".