Unctuous a. : Of the nature or quality of an unguent or ointment; fatty; oily; greasy.

Unctuous a. : Having a smooth, greasy feel, as certain minerals.

Unctuous a. : Bland; suave; also, tender; fervid; as, an unctuous speech; sometimes, insincerely suave or fervid.

Example:
how are fawning and Unctuous similar? how are attrition and abrade related?

Taxonomy
unctuous, unc, Dictionary, adjective, Synonyms, oil, Houghton Mifflin Company, ointment, Pronunciation, ness, ty, word origin, choo, characteristic, Medical Dictionary, The American, American Heritage, free online English dictionary.

Defination from the web:
Unctuous - Definition of Unctuous at Dictionary.com a free online dictionary with pronunciation, synonyms, and translation of Unctuous. Word of the Day and Crossword Puzzles. ... affected, exaggerated, or insincere earnestness: "the unctuous, complacent court composer who is consumed ...