weightlifting vs jerk

weightlifting and jerk both are nouns.

Word	Noun	Adjective	Verb	Adverb
weightlifting	Yes	No	No	No
jerk	Yes	No	Yes	No

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

weightlifting: bodybuilding by exercise that involves lifting weights
jerk: raising a weight from shoulder height to above the head by straightening the arms

Other hyponyms of weightlifting include bench press, clean, clean and jerk, military press, press, snatch, deadlift.

weightlifting (noun)	jerk (noun)
bodybuilding by exercise that involves lifting weights	an abrupt spasmodic movement
	a sudden abrupt pull
	raising a weight from shoulder height to above the head by straightening the arms
	meat (especially beef) cut in strips and dried in the sun
	a dull stupid fatuous person
	(mechanics) the rate of change of acceleration

weightlifting (verb)	jerk (verb)
	make an uncontrolled, short, jerky motion
	throw or toss with a quick motion
	pull, or move with a sudden movement
	move with abrupt, seemingly uncontrolled motions
	jump vertically, with legs stiff and back arched