strengthen vs work out

strengthen and work out both are verbs.

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

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

Other hypernyms of strengthen include exercise.

strengthen (verb)	work out (verb)
give a healthy elasticity to	do physical exercise
gain strength	give a workout to
make strong or stronger	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