fulsomeness vs smarminess

fulsomeness and smarminess both are nouns.

Word	Noun	Adjective	Verb	Adverb
fulsomeness	Yes	No	No	No
smarminess	Yes	No	No	No

As nouns, fulsomeness and smarminess are synonyms defined as:

Other synonyms of fulsomeness include oiliness, oleaginousness, unction, unctuousness.

fulsomeness (noun)	smarminess (noun)
smug self-serving earnestness	smug self-serving earnestness
excessive but superficial compliments given with affected charm