debility vs frailty

debility and frailty both are nouns.

Word	Noun	Adjective	Verb	Adverb
debility	Yes	No	No	No
frailty	Yes	No	No	No

As nouns, debility and frailty are synonyms defined as:

debility and frailty: the state of being weak in health or body (especially from old age)

Other synonyms of debility include feebleness, frailness, infirmity, valetudinarianism.

debility (noun)	frailty (noun)
the state of being weak in health or body (especially from old age)	moral weakness
	the state of being weak in health or body (especially from old age)