unction vs unctuousness

unction and unctuousness both are nouns.

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

As nouns, unction and unctuousness are synonyms defined as:

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

unction (noun)	unctuousness (noun)
anointing as part of a religious ceremony or healing ritual	smug self-serving earnestness
semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation
smug self-serving earnestness
excessive but superficial compliments given with affected charm