WordNet (r) 3.0 (2006):

titania
    n 1: a white powder used as a pigment for its high covering
         power and durability [syn: titanium dioxide, titanium
         oxide, titanic oxide, titania]
    2: (Middle Ages) the queen of the fairies in medieval folklore

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "Titania":
   Ariel, Befind, Corrigan, Finnbeara, Mab, Oberon, banshee, brownie,
   cluricaune, dwarf, elf, fairy, fairy queen, fay, gnome, goblin,
   gremlin, hob, imp, kobold, leprechaun, ouphe, peri, pixie, pooka,
   puca, pwca, sprite, sylph, sylphid