As nouns the difference between squawker and nitter
is that squawker is someone or something who/that squawks while nitter is (zoology) a louse that deposits nits on horses.
squawker
English
Noun
(
en noun)
someone or something who/that squawks
a person who complains or protests noisily
a loudspeaker used for frequencies intermediate between those of a woofer and a tweeter