unctuousness vs oleaginousness

unctuousness and oleaginousness both are nouns.

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

As nouns, unctuousness and oleaginousness are synonyms defined as:

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

unctuousness (noun)	oleaginousness (noun)
smug self-serving earnestness	consisting of or covered with oil
	smug self-serving earnestness