raptus vs convulsion

raptus and convulsion both are nouns.

Word	Noun	Adjective	Verb	Adverb
raptus	Yes	No	No	No
convulsion	Yes	No	No	No

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

Other hyponyms of raptus include focal seizure, raptus hemorrhagicus, absence, absence seizure.

raptus (noun)	convulsion (noun)
a state of being carried away by overwhelming emotion	a physical disturbance such as an earthquake or upheaval
a sudden occurrence (or recurrence) of a disease	violent uncontrollable contractions of muscles
	a sudden uncontrollable attack
	a violent disturbance