kvetch vs grumble

kvetch and grumble both are nouns.

Word	Noun	Adjective	Verb	Adverb
kvetch	Yes	No	Yes	No
grumble	Yes	No	Yes	No

As verbs, grumble is a hyponym of kvetch; that is, grumble is a word with a more specific, narrower meaning than kvetch:

kvetch (noun)	grumble (noun)
(Yiddish) a nagging complaint	a complaint uttered in a low and indistinct tone
(Yiddish) a constant complainer	a loud low dull continuous noise

kvetch (verb)	grumble (verb)
express complaints, discontent, displeasure, or unhappiness	make complaining remarks or noises under one's breath
	show one's unhappiness or critical attitude
	to utter or emit low dull rumbling sounds
	make a low noise