kvetch vs complain

kvetch is a noun but complain is not a noun.

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

As verbs, kvetch and complain are synonyms defined as:

kvetch and complain: express complaints, discontent, displeasure, or unhappiness

Other synonyms of kvetch include kick, plain, quetch, sound off.

kvetch (noun)	complain (noun)
(Yiddish) a nagging complaint
(Yiddish) a constant complainer

kvetch (verb)	complain (verb)
express complaints, discontent, displeasure, or unhappiness	express complaints, discontent, displeasure, or unhappiness
	make a formal accusation; bring a formal charge