brainwave vs revelation

brainwave and revelation both are nouns.

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

As nouns, revelation is a hyponym of brainwave; that is, revelation is a word with a more specific, narrower meaning than brainwave:

brainwave: the clear (and often sudden) understanding of a complex situation
revelation: an enlightening or astonishing disclosure

Other hyponyms of brainwave include light, breakthrough, discovery, find, flash.

brainwave (noun)	revelation (noun)
the clear (and often sudden) understanding of a complex situation	an enlightening or astonishing disclosure
(neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph	communication of knowledge to man by a divine or supernatural agency
	the speech act of making something evident