quack (n.)
- bluff
- bluffer
- cackle
- call
- carol
- caw
- charlatan
- chatter
- cheep
- chirp
- chirrup
- chuck
- clack
- cluck
- cock-a-doodle-doo
- coo
- counterfeit
- counterfeiter
- croak
- crow
- cuckoo
- drum
- fake
- faker
- fraud
- gabble
- gaggle
- gobble
- honk
- hoo
- hoot
- humbug
- impersonator
- impostor
- malingerer
- mountebank
- peep
- phony
- pip
- pipe
- poser
- poseur
- pretender
- ringer
- roll
- scold
- sham
- shammer
- simulator
- sing
- squawk
- trill
- tweet
- twit
- warble
- whistle
