WordNet (r) 3.0 (2006):

miasmic
    adj 1: of noxious stench from atmospheric pollution [syn:
           miasmic, mephitic]
    2: filled with vapor; "miasmic jungles"; "a vaporous bog" [syn:
       miasmal, miasmic, vaporous, vapourous]

Moby Thesaurus II by Grady Ward, 1.0:

124 Moby Thesaurus words for "miasmic":
   abhorrent, abominable, aerial, aerodynamic, aerostatic, aery, airy,
   bad, bad-smelling, base, beastly, below contempt, beneath contempt,
   catching, communicable, contagious, contemptible, crude, deadly,
   despicable, destructive, detestable, disgusting, envenomed,
   ethereal, execrable, fecal, fetid, forbidding, foul, frowsty,
   frowy, frowzy, fulsome, fuming, fumy, funky, fusty, gamy, gaseous,
   gasified, gasiform, gaslike, gassy, graveolent, gross, hateful,
   heinous, high, ignoble, ill-smelling, infectious, infective,
   loathsome, malign, malignant, malodorous, mephitic, miasmal,
   miasmatic, mildewed, mildewy, moldy, musty, nasty, nauseating,
   nidorous, noisome, noxious, objectionable, obnoxious, obscene,
   odious, odorous, offensive, olid, oxyacetylene, oxygenous, ozonic,
   pestiferous, pestilential, pneumatic, poisonous, putrid, rancid,
   rank, reasty, reasy, rebarbative, reechy, reeking, reeky,
   repellent, repugnant, repulsive, revolting, rotten, sickening,
   smellful, smelling, smelly, smoking, smoky, steaming, steamy,
   stenchy, stinking, strong, stuffy, sulfurous, toxic, toxicant,
   toxiferous, vaporing, vaporish, vaporlike, vaporous, vapory,
   venenate, veneniferous, venenous, venomous, vile, virulent