grumbler vs crybaby

grumbler and crybaby both are nouns.

Word	Noun	Adjective	Verb	Adverb
grumbler	Yes	No	No	No
crybaby	Yes	No	No	No

As nouns, grumbler and crybaby are synonyms defined as:

grumbler and crybaby: a person given to excessive complaints and crying and whining

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

grumbler (noun)	crybaby (noun)
a person given to excessive complaints and crying and whining	a person given to excessive complaints and crying and whining
	a person who lacks confidence, is irresolute and wishy-washy