Synonyms for Slickness (same or very similar meaning)
WordNet sense 1 (verbal misrepresentation intended to take advantage of you in some way):
hocus-pocus, skulduggery, skullduggery, trickery, jiggery-pokeryWordNet sense 2 (a kind of fluent easy superficiality):
glibnessWordNet sense 3 (a slippery smoothness):
slick, slip, slipperinessFrom the ODE community, based on WordNetadd/edit