malady vs unwellness

malady and unwellness both are nouns.

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

As nouns, malady and unwellness are synonyms defined as:

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

Other synonyms of malady include illness, sickness.

malady (noun)	unwellness (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