quack vs acquit

quack is a noun but acquit is not a noun.

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

As verbs, acquit is a hypernym of quack; that is, acquit is a word with a broader meaning than quack:

quack: act as a medical quack or a charlatan
acquit: behave in a certain manner; show a certain behavior; conduct or comport oneself

Other hypernyms of quack include act, bear, behave, carry, comport, conduct, deport, do.

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

quack (adjective)	acquit (adjective)
medically unqualified

quack (verb)	acquit (verb)
act as a medical quack or a charlatan	behave in a certain manner; show a certain behavior; conduct or comport oneself
utter quacking noises	pronounce not guilty of criminal charges