convulsion vs disturbance

convulsion and disturbance both are nouns.

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

As nouns, disturbance is a hypernym of convulsion; that is, disturbance is a word with a broader meaning than convulsion:

Other hypernyms of convulsion include commotion, disruption, flutter, hoo-ha, hoo-hah, hurly burly, kerfuffle, to-do.

convulsion (noun)	disturbance (noun)
a physical disturbance such as an earthquake or upheaval	the act of disturbing something or someone; setting something in motion
violent uncontrollable contractions of muscles	a noisy fight
a sudden uncontrollable attack	activity that is a malfunction, intrusion, or interruption
a violent disturbance	electrical or acoustic activity that can disturb communication
	a disorderly outburst or tumult
	(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness
	an unhappy and worried mental state