N bane, curse, evil, hurtfulness, painfulness, scourge, damnosa hereditas, white elephant, sting, fang, thorn, tang, bramble, brier, nettle, poison, toxin, teratogen, leaven, virus venom, arsenic, antimony, tartar emetic, strychnine, nicotine, miasma, miasm, mephitis, malaria, azote, sewer gas, pest, Albany hemp, arsenious oxide, arsenious acid, bichloride of mercury, carbonic acid, carbonic gas, choke damp, corrosive sublimate, fire damp, hydrocyanic acid, cyanide, Prussic acid, hydrogen cyanide, marsh gas, nux vomica, ratsbane, hemlock, hellebore, nightshade, belladonna, henbane, aconite, banewort, bhang, ganja, hashish, Upas tree, Toxline (online), rust, worm, helminth, moth, moth and rust, fungus, mildew, dry rot, canker, cankerworm, cancer, torpedo, viper, demon, toxicology, baneful, poisonous, phr, bibere venenum in auro, Contingent Subservience.

For further exploring for "teratogen" in Webster Dictionary Online