wasting vs infirmity

wasting and infirmity both are nouns.

Word	Noun	Adjective	Verb	Adverb
wasting	Yes	No	No	No
infirmity	Yes	No	No	No

As nouns, infirmity is a hypernym of wasting; that is, infirmity is a word with a broader meaning than wasting:

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

Other hypernyms of wasting include debility, feebleness, frailness, frailty, valetudinarianism.

wasting (noun)	infirmity (noun)
a decrease in size of an organ caused by disease or disuse	the state of being weak in health or body (especially from old age)
any general reduction in vitality and strength of body and mind resulting from a debilitating chronic disease