WordNet (r) 3.0 (2006):

flirtatious
    adj 1: like a coquette [syn: coquettish, flirtatious]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "flirtatious":
   alluring, amative, amatory, amorous, appealing, appetizing,
   attractive, beguiling, bewitching, blandishing, cajoling,
   captivating, caressive, catching, changeable, charismatic,
   charming, coaxing, come-hither, coquettish, coy, enchanting,
   engaging, enravishing, enthralling, enticing, entrancing, exciting,
   exotic, faddish, fascinating, fetching, fickle, flighty, flirty,
   glamorous, hypnotic, inconstant, interesting, intriguing, inviting,
   irresistible, light, mercurial, mesmeric, mouth-watering,
   philandering, piquant, prepossessing, provocative, provoquant,
   quicksilver, ravishing, seducing, seductive, sexual, siren,
   sirenic, skittish, spellbinding, spellful, taking, tantalizing,
   teasing, tempting, tickling, titillating, titillative, toying,
   undependable, unpredictable, unreliable, vacillating, versatile,
   volatile, winning, winsome, witching