squawker vs complainer

squawker and complainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
squawker	Yes	No	No	No
complainer	Yes	No	No	No

As nouns, squawker and complainer are synonyms defined as:

squawker and complainer: a person given to excessive complaints and crying and whining

Other synonyms of squawker include bellyacher, crybaby, grumbler, moaner, sniveller, whiner.

squawker (noun)	complainer (noun)
the loudspeaker on an intercom or public address system	a person given to excessive complaints and crying and whining
a person given to excessive complaints and crying and whining