Challenge words and challenge poems were always difficult for me, and this seems to be an exceptionally difficult word to write on! Like, how does one find poetic inspiration with the word "liar" (makes me immediately think of my first Ex-Wife)!
You have done well with this, especially it being a tricky or difficult word challenge!
I like the word play on 'immaculate liar'... it is contradicting in a sense but also not as I suppose it's a description of the type of liar. You've painted a picture of a slimy character and a 50's type man comes to mind with oil-slicked hair and a pin-stripe suit and phony smile on his thin lips. Strange how words can conjure up an image. You've compiled this beautifully! Very well written.
You said this one was full of words not normally used. We usually don't undulate but sometimes speaking in precise meanings makes our words communicate more clearly. Who hasn't seen a smooth talker ride in on a wave? as in undulate?
These kinds of pieces are difficult to write, but it all seems to fit. Nice work, thanks for pointing out the purveyor of charade.
I like the poem overall. Might have changed ambassador to love to ambassador of love. Other than that, I wouldn't really change anything. And I like the single word that follows that stanzas. It gives the word more punch.