revelation vs brainwave

revelation and brainwave both are nouns.

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

As nouns, brainwave is a hypernym of revelation; that is, brainwave is a word with a broader meaning than revelation:

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

Other hypernyms of revelation include brainstorm, insight.

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