mush vs sentimentalism

mush and sentimentalism both are nouns.

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

As nouns, sentimentalism is a hypernym of mush; that is, sentimentalism is a word with a broader meaning than mush:

mush: writing or music that is excessively sweet and sentimental
sentimentalism: the excessive expression of tender feelings, nostalgia, or sadness in any form

mush (noun)	sentimentalism (noun)
a journey by dogsled	a predilection for sentimentality
writing or music that is excessively sweet and sentimental	the excessive expression of tender feelings, nostalgia, or sadness in any form
cornmeal boiled in water
any soft or soggy mass

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