unwellness vs malady

unwellness and malady both are nouns.

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

As nouns, unwellness and malady are synonyms defined as:

unwellness and malady: impairment of normal physiological function affecting part or all of an organism

Other synonyms of unwellness include illness, sickness.

unwellness (noun)	malady (noun)
impairment of normal physiological function affecting part or all of an organism	impairment of normal physiological function affecting part or all of an organism
	any unwholesome or desperate condition