sinker vs paczki

sinker and paczki both are nouns.

Word	Noun	Adjective	Verb	Adverb
sinker	Yes	No	No	No
paczki	Yes	No	No	No

As nouns, paczki is a hyponym of sinker; that is, paczki is a word with a more specific, narrower meaning than sinker:

Other hyponyms of sinker include raised doughnut.

sinker (noun)	paczki (noun)
a pitch that curves downward rapidly as it approaches the plate	A traditional Polish doughnut.
a weight that sinks (as to hold nets or fishing lines under water)
a small ring-shaped friedcake