oleaginousness vs unctuousness

oleaginousness and unctuousness both are nouns.

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

As nouns, oleaginousness and unctuousness are synonyms defined as:

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

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