weightlift vs work out

weightlift is a noun but work out is not a noun.

Word	Noun	Adjective	Verb	Adverb
weightlift	Yes	No	Yes	No
work out	No	No	Yes	No

As verbs, work out is a hypernym of weightlift; that is, work out is a word with a broader meaning than weightlift:

Other hypernyms of weightlift include exercise.

weightlift (noun)	work out (noun)
bodybuilding by exercise that involves lifting weights

weightlift (verb)	work out (verb)
lift weights	do physical exercise
	give a workout to
	come up with
	work out in detail
	find the solution to (a problem or question) or understand the meaning of
	make a mathematical calculation or computation
	be calculated
	happen in a certain way, leading to, producing, or resulting in a certain outcome, often well