unctuous vs soapy

unctuous and soapy both are adjectives.

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

As adjectives, unctuous and soapy are synonyms defined as:

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

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

unctuous (adjective)	soapy (adjective)
unpleasantly and excessively suave or ingratiating in manner or speech	resembling or having the qualities of soap
	unpleasantly and excessively suave or ingratiating in manner or speech