WordNet (r) 3.0 (2006):

overrefined
    adj 1: excessively delicate or refined [syn: overrefined,
           superfine]

Moby Thesaurus II by Grady Ward, 1.0:

93 Moby Thesaurus words for "overrefined":
   Gongoresque, Gongoristic, Marinistic, affected, allergic,
   anaphylactic, apparently sound, artificial, casuistic, chichi,
   colorable, deceptive, delicate, disingenuous, elaborate,
   elaborated, elegant, empathetic, empathic, empty, euphemistic,
   euphuistic, exquisite, fallacious, formalistic, goody good-good,
   goody-goody, goosy, hairsplitting, hollow, hypercritical,
   hyperelegant, hyperesthetic, hyperpathic, hypersensitive, illusive,
   insincere, irritable, itchy, jesuitic, la-di-da, mannered, mincing,
   morbidly sensitive, namby-pamby, nervous, overconscientious,
   overcritical, overelaborate, overelegant, overfastidious,
   overmeticulous, overnice, overparticular, overprecise,
   overscrupulous, oversensible, oversensitive, oversqueamish,
   oversubtle, overtender, passible, pedantic, philosophistic,
   plausible, precieuse, precieux, precious, precisian,
   precisianistic, precisionistic, pretentious, prickly, puristic,
   refined, responsive, sensitive, simpering, skittish, sophistic,
   sophistical, specious, studied, supersensitive, sympathetic,
   tactful, tender, tetchy, thin-skinned, ticklish, touchy,
   ultracritical, unnatural