mushiness vs sentimentality

mushiness and sentimentality both are nouns.

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

As nouns, mushiness and sentimentality are synonyms defined as:

Other synonyms of mushiness include drippiness, mawkishness, sloppiness, soupiness.

mushiness (noun)	sentimentality (noun)
a mushy pulpy softness	falsely emotional in a maudlin way
falsely emotional in a maudlin way	extravagant or affected feeling or emotion