kvetch vs peck

kvetch and peck both are nouns.

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

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

kvetch (noun)	peck (noun)
(Yiddish) a nagging complaint	a light kiss
(Yiddish) a constant complainer	bite by a bird
	(often followed by `of') a large number or amount or extent
	a United States dry measure equal to 8 quarts or 537.605 cubic inches
	a British imperial capacity measure (liquid or dry) equal to 2 gallons

kvetch (verb)	peck (verb)
express complaints, discontent, displeasure, or unhappiness	bother persistently with trivial complaints
	eat by pecking at, like a bird
	eat like a bird
	kiss lightly
	hit lightly with a picking motion