The Collaborative International Dictionary of English v.0.48:

Hex- \Hex-\, Hexa \Hex"a\ [Gr. "e`x six. See Six.]
   A prefix or combining form, used to denote six, sixth, etc.;
   as, hexatomic, hexabasic.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

118 Moby Thesaurus words for "hex":
   Jonah, Weird Sisters, abuse, accurse, afflict, aggrieve, anathema,
   anathematize, bad influence, ban, bedevil, befoul, bewitch,
   blaspheme, blasphemy, blast, blight, bring bad luck, cantrip,
   charm, commination, condemn, confound, corrupt, coven, crucify,
   curse, damage, damn, damnation, darn, defile, demonize,
   denunciation, deprave, despoil, destroy, diabolize, disadvantage,
   disserve, distress, do a mischief, do evil, do ill, do wrong,
   do wrong by, doom, enchant, enchantment, enchantress, envenom,
   evil eye, evil genius, evil star, excommunicate, excommunication,
   execrate, execration, exorcism, fulminate against, fulmination,
   get into trouble, glamour, hag, harass, harm, hoodoo, hurt,
   ill wind, impair, imprecate, imprecation, infect, injure, jinx,
   lamia, magic spell, malevolent influence, malison, malocchio,
   maltreat, menace, mistreat, molest, obsess, outrage, overlook,
   persecute, play havoc with, play hob with, poison, pollute,
   possess, prejudice, proscription, savage, scathe, shamaness,
   sorceress, spell, taint, threaten, throw a whammy, thunder against,
   thundering, torment, torture, violate, voodoo, wanga, weird,
   whammy, witch, witchwife, witchwoman, wound, wreak havoc on,
   wrong