quack - definition, thesaurus and related words from WordNet-Online

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Adjective quack has 1 sense

quack - medically unqualified; "a quack doctor"
Antonym: qualified (indirect, via unqualified)

Noun quack has 2 senses

quack - an untrained person who pretends to be a physician and who dispenses medical advice
--₁ is a kind of doctor, doc, physician, MD, Dr., medico; mountebank, charlatan

Derived form: verb quack₂
quack - the harsh sound of a duck
--₂ is a kind of sound

Derived form: verb quack₁

Verb quack has 2 senses

quack - utter quacking noises; "The ducks quacked"
--₁ is one way to utter, emit, let out, let loose

Derived form: noun quack₂
Sample sentence:
Something ----s
quack - act as a medical quack or a charlatan
--₂ is one way to act, behave, do

Derived forms: noun quack₁, noun quackery₁
Sample sentence:
Somebody ----s