Perhaps you need to read more widely. According to my dictionary, the word prevaricate had appeared in English by 1631, two hundred years before the Church of Jesus Christ of Latter-day Saints was organized.
The word was not invented to apply to Mormons, nor has it been applied exclusively to Mormons, your limited acquaintance with it notwithstanding.
(Your use of Google is puzzling. Is it supposed to prove something?)
If "Prevaricate/prevarication" was a rare character trait of Mormons, I don't think we'd see a common Google association, now would we?
(People can make the same Google search for themselves, review the articles that pop up, and see for themselves)