Zyzzyva is a genus of tropical American weevil, a snouted beetle, often found in association with palms. "Zyzzyva" is also the last word in many English-language dictionaries. For those of you looking for that last cache for your challenge, the one starting with a "Z", this should do it for you. Typical hide, BYOP
As an added bonus, it's worth 43 Scrabble points!