indisposition vs malady

indisposition and malady both are nouns.

Word	Noun	Adjective	Verb	Adverb
indisposition	Yes	No	No	No
malady	Yes	No	No	No

As nouns, malady is a hypernym of indisposition; that is, malady is a word with a broader meaning than indisposition:

indisposition: a slight illness
malady: impairment of normal physiological function affecting part or all of an organism

Other hypernyms of indisposition include illness, sickness, unwellness.

indisposition (noun)	malady (noun)
a certain degree of unwillingness	impairment of normal physiological function affecting part or all of an organism
a slight illness	any unwholesome or desperate condition