quack
1 of 5verb (1)
ˈkwak 
quacked; quacking; quacks
intransitive verb
: to make the characteristic cry of a duck
quack
2 of 5noun (1)
: a noise made by quacking
quack
3 of 5verb (2)
quacked; quacking; quacks
intransitive verb
: to act like a quack
quack
4 of 5noun (2)
1
: charlatan sense 2
Religious quacks on radio and television thinking up new ways to take money from ignorant listeners and incidentally from legitimate churches.
Andrew A. Rooney
Andrew A. Rooney2
: an ignorant, misinformed, or dishonest practitioner of medicine
No doubt these misunderstandings and dashed hopes have driven many cancer patients and their families into the arms of quacks. Haydn Bush
Haydn Bush quackish
ˈkwa-kish
adjective quack
5 of 5adjective
: of, relating to, or used by quacks
quack cancer cures
Synonyms
Noun (2)
- charlatan
- fake
- faker
- fakir
- fraud
- hoaxer
- humbug
- impostor
- imposter
- mountebank
- phony
- phoney
- pretender
- quacksalver
- ringer
- sham
See all Synonyms & Antonyms 
Word History
Etymology
Verb (1)
alteration of queck to quack, from Middle English queken, from queke, interjection, of imitative origin
Noun (2) and Verb (2)
short for quacksalver
First Known Use
Verb (1)
14th century, in the meaning defined above
Noun (1)
1798, in the meaning defined above
Verb (2)
1628, in the meaning defined above
Noun (2)
1638, in the meaning defined at sense 1
Adjective
1653, in the meaning defined above
Phrases Containing quack
Kids Definition
quack 1 of 4
verb
ˈkwak
quacked; quacking
: to make the cry of a duck
quack
2 of 4noun
: a cry made by a duck
quack
3 of 4noun
: a person who pretends to have medical knowledge and skill
quack
4 of 4adjective
: relating to, being, or used by a person who pretends to have medical skill
a quack doctor
quack remedies
Medical Definition
quack 1 of 2
noun
ˈkwak
: a pretender to medical skill : an ignorant or dishonest practitioner
quack
2 of 2adjective
: of, relating to, characteristic of, or being a quack
scores of quack remedies for arthritis Jane E. Brody
Jane E. Brodyquack
noun
as in fake
one who makes false claims of identity or expertise don't bother to see that guy, as I've heard he's a quack with no actual training Synonyms & Similar Words
Relevance
- fake
- fraud
- sham
- charlatan
- pretender
- mountebank
- faker
- misleader
- deceiver
- phony
- impostor
- imposter
- phoney
- quacksalver
- fakir
- counterfeiter
- hoaxer
- humbug
- ringer
- operator
- actor
- copycat
- imitator
- mimic
- sharper
- dissembler
- skinner
- swindler
- impersonator
- poseur
- trickster
- duper
- bluffer
- feigner
- dodger
- defrauder
- fraudster
- scammer
- scamster
- cozener
- sharpie
- sharpy
Antonyms & Near Antonyms
- expert
- master
- professional
- wizard
- authority
- virtuoso
- whiz
- ace
- maestro
- past master
- adept
- crackerjack
- crackajack