epilepsy vs encephalopathy

epilepsy and encephalopathy both are nouns.

Word	Noun	Adjective	Verb	Adverb
epilepsy	Yes	No	No	No
encephalopathy	Yes	No	No	No

As nouns, encephalopathy is a hypernym of epilepsy; that is, encephalopathy is a word with a broader meaning than epilepsy:

epilepsy: a disorder of the central nervous system characterized by loss of consciousness and convulsions
encephalopathy: any disorder or disease of the brain

Other hypernyms of epilepsy include brain disease, brain disorder.

epilepsy (noun)	encephalopathy (noun)
a disorder of the central nervous system characterized by loss of consciousness and convulsions	any disorder or disease of the brain