unctuous vs oleaginous

unctuous and oleaginous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unctuous	No	Yes	No	No
oleaginous	No	Yes	No	No

As adjectives, unctuous and oleaginous are synonyms defined as:

unctuous and oleaginous: unpleasantly and excessively suave or ingratiating in manner or speech

Other synonyms of unctuous include buttery, fulsome, oily, smarmy, soapy.

unctuous (adjective)	oleaginous (adjective)
unpleasantly and excessively suave or ingratiating in manner or speech	containing an unusual amount of grease or oil
	unpleasantly and excessively suave or ingratiating in manner or speech