thresh about vs convulse

thresh about and convulse both are verbs.

Word	Noun	Adjective	Verb	Adverb
thresh about	No	No	Yes	No
convulse	No	No	Yes	No

As verbs, thresh about and convulse are synonyms defined as:

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

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