kvetch vs bitch

kvetch and bitch both are nouns.

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

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

kvetch (noun)	bitch (noun)
(Yiddish) a nagging complaint	female of any member of the dog family
(Yiddish) a constant complainer	informal terms for objecting
	a person (usually but not necessarily a woman) who is thoroughly disliked
	an unpleasant difficulty

kvetch (verb)	bitch (verb)
express complaints, discontent, displeasure, or unhappiness	say mean things
	complain