mead vs czworniak

mead and czworniak both are nouns.

Word	Noun	Adjective	Verb	Adverb
mead	Yes	No	No	No
czworniak	Yes	No	No	No

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

mead: made of fermented honey and water
czworniak: a Polish mead, made using three units of water for each unit of honey.

Other hyponyms of mead include metheglin, dwojniak, trojniak.

mead (noun)	czworniak (noun)
made of fermented honey and water	a Polish mead, made using three units of water for each unit of honey.