WordNet (r) 3.0 (2006):

savoir-faire
    n 1: social skill [syn: savoir-faire, address]

Moby Thesaurus II by Grady Ward, 1.0:

104 Moby Thesaurus words for "savoir-faire":
   ability, adaptability, address, adeptness, adroitness, affection,
   airmanship, aplomb, artfulness, artisanship, artistry, attribute,
   bienseance, blaseness, bravura, brilliance, capability, capacity,
   character, characteristic, cleverness, command, competence,
   confidence, control, coordination, correctitude, correctness,
   craft, craftsmanship, cunning, deftness, dexterity, dexterousness,
   dextrousness, dignity, diplomacy, discernment, efficiency,
   elegance, experience, expertise, exquisite manners, facility,
   feature, finesse, flavor, good behavior, good manners, grace, grip,
   handiness, horsemanship, ingeniousness, ingenuity, know-how,
   mannerliness, manners, mark, marksmanship, mastership, mastery,
   poise, polite behavior, practical ability, proficiency, property,
   prowess, quickness, readiness, refinement, relish, resource,
   resourcefulness, sapidity, sapor, savoir-vivre, savor, savvy,
   scent, seamanship, self-assurance, self-possession, skill,
   skillfulness, smack, sophistication, style, tact, tactfulness,
   tang, taste, technical brilliance, technical mastery,
   technical skill, technique, timing, tinge, trait, virtue,
   virtuosity, wit, wizardry, workmanship