convulse vs jactitate

convulse and jactitate both are verbs.

Word	Noun	Adjective	Verb	Adverb
convulse	No	No	Yes	No
jactitate	No	No	Yes	No

As verbs, convulse and jactitate are synonyms defined as:

Other synonyms of convulse include slash, thrash, thrash about, thresh, thresh about, toss.

convulse (verb)	jactitate (verb)
be overcome with laughter	move or stir about violently
make someone convulse with laughter
contract involuntarily, as in a spasm
cause to contract
move or stir about violently
shake uncontrollably