brainwave vs insight

brainwave and insight both are nouns.

Word	Noun	Adjective	Verb	Adverb
brainwave	Yes	No	No	No
insight	Yes	No	No	No

As nouns, brainwave and insight are synonyms defined as:

brainwave and insight: the clear (and often sudden) understanding of a complex situation

Other synonyms of brainwave include brainstorm.

brainwave (noun)	insight (noun)
the clear (and often sudden) understanding of a complex situation	grasping the inner nature of things intuitively
(neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph	the clear (and often sudden) understanding of a complex situation
	clear or deep perception of a situation
	a feeling of understanding