worn out vs spent

worn out and spent both are adjectives.

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

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

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

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

worn out (adjective)	spent (adjective)
drained of energy or effectiveness; extremely tired; completely exhausted	depleted of energy, force, or strength
	drained of energy or effectiveness; extremely tired; completely exhausted