sentimentalism vs mush

sentimentalism and mush both are nouns.

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

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

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

Other hyponyms of sentimentalism include glop, slop, treacle.

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

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