fulsomeness vs oleaginousness

fulsomeness and oleaginousness both are nouns.

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

As nouns, fulsomeness and oleaginousness are synonyms defined as:

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

fulsomeness (noun)	oleaginousness (noun)
smug self-serving earnestness	consisting of or covered with oil
excessive but superficial compliments given with affected charm	smug self-serving earnestness