cachexia vs debility

cachexia and debility both are nouns.

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

As nouns, debility is a hypernym of cachexia; that is, debility is a word with a broader meaning than cachexia:

cachexia: any general reduction in vitality and strength of body and mind resulting from a debilitating chronic disease
debility: the state of being weak in health or body (especially from old age)

Other hypernyms of cachexia include feebleness, frailness, frailty, infirmity, valetudinarianism.

cachexia (noun)	debility (noun)
any general reduction in vitality and strength of body and mind resulting from a debilitating chronic disease	the state of being weak in health or body (especially from old age)