peck vs quetch

peck is a noun but quetch is not a noun.

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

As verbs, quetch is a hypernym of peck; that is, quetch is a word with a broader meaning than peck:

Other hypernyms of peck include complain, kick, kvetch, plain, sound off.

peck (noun)	quetch (noun)
a light kiss
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

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