quack

nouns

an untrained person who pretends to be a physician and who dispenses medical advice
quack
is a type of (narrower)
a licensed medical practitioner
"I felt so bad I went to see my doctor"
Dr., MD, doc, doctor, medico, physician
is a type of (narrower)
a flamboyant deceiver; one who attracts customers with tricks or jokes
charlatan, mountebank
the harsh sound of a duck
quack
is a type of (narrower)
the sudden occurrence of an audible event
"the sound awakened them"
sound

verbs

utter quacking noises
"The ducks quacked"
quack
is a type of (narrower)
express audibly; utter sounds (not necessarily words)
"She let out a big heavy sigh"; "He uttered strange sounds that nobody could understand"
emit, let loose, let out, utter
act as a medical quack or a charlatan
quack
is derived from
quackery
domain category
the learned profession that is mastered by graduate training in a medical school and that is devoted to preventing or alleviating or curing diseases and injuries
"he studied medicine at Harvard"
medicine, practice of medicine
is a type of (narrower)
behave in a certain manner; show a certain behavior; conduct or comport oneself
"You should act like an adult"; "Don't behave like a fool"; "What makes her do this way?"; "The dog acts ferocious, but he is really afraid of people"
act, behave, do

adjectives

medically unqualified
"a quack doctor"
quack
is similar to
not meeting the proper standards and requirements and training
unqualified