mush vs polenta

mush and polenta both are nouns.

Word	Noun	Adjective	Verb	Adverb
mush	Yes	No	Yes	No
polenta	Yes	No	No	No

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

Other hyponyms of mush include atole, hasty pudding.

mush (noun)	polenta (noun)
a journey by dogsled	a thick mush made of cornmeal boiled in stock or water
writing or music that is excessively sweet and sentimental
cornmeal boiled in water
any soft or soggy mass

mush (verb)	polenta (verb)
travel with a dogsled
drive (a team of dogs or a dogsled)