petit mal vs epileptic seizure

petit mal and epileptic seizure both are nouns.

Word	Noun	Adjective	Verb	Adverb
petit mal	Yes	No	No	No
epileptic seizure	Yes	No	No	No

As nouns, epileptic seizure is a hypernym of petit mal; that is, epileptic seizure is a word with a broader meaning than petit mal:

petit mal: a seizure of short duration characterized by momentary unconsciousness and local muscle spasms or twitching
epileptic seizure: convulsions accompanied by impaired consciousness

petit mal (noun)	epileptic seizure (noun)
a seizure of short duration characterized by momentary unconsciousness and local muscle spasms or twitching	convulsions accompanied by impaired consciousness
epilepsy characterized by paroxysmal attacks of brief clouding of consciousness (and possibly other abnormalities)