quack vs unqualified

quack is a noun but unqualified is not a noun.

Word	Noun	Adjective	Verb	Adverb
quack	Yes	Yes	Yes	No
unqualified	No	Yes	No	No

quack (noun)	unqualified (noun)
the harsh sound of a duck
an untrained person who pretends to be a physician and who dispenses medical advice

quack (adjective)	unqualified (adjective)
medically unqualified	not meeting the proper standards and requirements and training
	not limited or restricted
	legally not qualified or sufficient
	having no right or entitlement

quack (verb)	unqualified (verb)
act as a medical quack or a charlatan
utter quacking noises