Fer-de-lance(n.) A large, venomous serpent (Trigonocephalus lanceolatus) of Brazil and the West Indies. It is allied to the rattlesnake, but has no rattle.
Thesaurus Entries
Benedict Arnold, Brutus, Judas, Judas Iscariot, Quisling, adder, anaconda, animal, archtraitor, asp, beast, bend, betrayer, blacksnake, blind snake, boa, boa constrictor, bull snake, bushmaster, cobra, cobra de capello, cockatrice, conniver, conspirator, conspirer, constrictor, contort, copperhead, coral snake, corkscrew, cottonmouth, crawl, creep, crinkle, crook, cur, curve, daboia, diamondback, divagate, dog, double agent, double-crosser, double-dealer, drag, draggle, draw, drift, err, excurse, fer-de-lance, fink, flick, flip, flirt, flounce, garter snake, glide, go adrift, go astray, go on tiptoe, gopher snake, grovel, gumshoe, hale, hamadryad, haul, heave, hitch, hog-nose snake, hook, horned rattlesnake, horned viper, hound, hyena, inch, inch along, informer, insect, intort, intrigant, intriguer, jerk, jig, jigger, jigget, jiggle, jog, joggle, king cobra, king snake, krait, lift, loop, lug, lurk, machinator, mamba, meander, milk snake, moccasin, mongrel, nab, nail, nick, nightwalk, nip, ophidian, pad, pererrate, pig, pinch, pine snake, pit viper, plotter, pluck, polecat, prick, prowl, puff adder, pull, pussyfoot, python, quisling, racer, ramble, rat, rat snake, rattler, rattlesnake, reptile, rove, scallop, schemer, scrabble, scramble, screw, scum, sea snake, serpent, serpentine, shirk, shit, shithead, shovel-nose, sidewinder, sidle, skulk, skunk, slidder, slide, slink, slip, slither, snatch, sneak, snitch, spectacled cobra, steal, steal along, straggle, stray, swine, swipe, swirl, take in tow, thunder snake, timeserver, tippytoe, tiptoe, toad, tow, trail, train, traitor, trawl, treasonist, trimmer, troll, tug, turd, turn, turncoat, tweak, twine, twirl, twist, twist and turn, twitch, undulate, urutu, varmint, vermin, viper, wander, water moccasin, water snake, whelp, whirl, whorl, wind, worm, worm along, worm snake, wrench, wring, yank, yerk, zigzag