shmaltz vs mushiness

shmaltz and mushiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
shmaltz	Yes	No	No	No
mushiness	Yes	No	No	No

As nouns, mushiness is a hypernym of shmaltz; that is, mushiness is a word with a broader meaning than shmaltz:

Other hypernyms of shmaltz include drippiness, mawkishness, sentimentality, sloppiness, soupiness.

shmaltz (noun)	mushiness (noun)
(Yiddish) excessive sentimentality in art or music	a mushy pulpy softness
	falsely emotional in a maudlin way