complaint vs whimper

complaint and whimper both are nouns.

Word	Noun	Adjective	Verb	Adverb
complaint	Yes	No	No	No
whimper	Yes	No	Yes	No

As nouns, whimper is a hyponym of complaint; that is, whimper is a word with a more specific, narrower meaning than complaint:

Other hyponyms of complaint include grievance, grumble, grumbling, murmur, murmuring, mutter, muttering, jeremiad, kvetch, pet peeve, whine.

complaint (noun)	whimper (noun)
an expression of grievance or resentment	a complaint uttered in a plaintive whining way
(formerly) a loud cry (or repeated cries) of pain or rage or sorrow
(civil law) the first pleading of the plaintiff setting out the facts on which the claim for relief is based
(criminal law) a pleading describing some wrong or offense
an often persistent bodily disorder or disease; a cause for complaining

complaint (verb)	whimper (verb)
	cry weakly or softly