squawker vs sniveller

squawker and sniveller both are nouns.

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

As nouns, squawker and sniveller are synonyms defined as:

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

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

squawker (noun)	sniveller (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