unctuousness vs smarminess

unctuousness and smarminess both are nouns.

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

As nouns, unctuousness and smarminess are synonyms defined as:

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

unctuousness (noun)	smarminess (noun)
smug self-serving earnestness	smug self-serving earnestness