spent vs worn-out

spent and worn-out both are adjectives.

Word	Noun	Adjective	Verb	Adverb
spent	No	Yes	No	No
worn-out	No	Yes	No	No

As adjectives, spent and worn-out are synonyms defined as:

spent and worn-out: drained of energy or effectiveness; extremely tired; completely exhausted

Other synonyms of spent include dog-tired, exhausted, fagged, fatigued, gone, played out, washed-out, worn out.

spent (adjective)	worn-out (adjective)
depleted of energy, force, or strength	drained of energy or effectiveness; extremely tired; completely exhausted
drained of energy or effectiveness; extremely tired; completely exhausted	used until no longer useful