WordWeb Online

1. Morally offensive
   "odiferous legislation";
   - odoriferous
    
2. Emitting an odour
   "odiferous salt pork and weevily hardtack";
   - odoriferous, odorous
    
3. Having a natural fragrance
   "odiferous spices";
   - odoriferous, odorous, perfumed, scented, sweet, sweet-scented, sweet-smelling

See also: fragrant, ill-smelling, malodorous, malodourous [Brit, Cdn, non-standard], minging [Brit], offensive, pongy [Brit], stinky, unpleasant-smelling, unsavory [US], unsavoury [Brit, Cdn], whiffy [Brit]