The Collaborative International Dictionary of English v.0.48:

Vainglorious \Vain`glo"ri*ous\, a.
   Feeling or indicating vainglory; elated by vanity; boastful.
   "Arrogant and vainglorious expression." --Sir M. Hale. --
   Vain`glo"ri*ous*ly, adv. -- Vain`glo"ri*ous*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

vainglorious
    adj 1: feeling self-importance; "too big for his britches"; "had
           a swelled head"; "he was swelled with pride" [syn: big,
           swelled, vainglorious]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "vainglorious":
   Gascon, boastful, boasting, braggart, bragging, complacent,
   conceited, consequential, disdainful, fanfaron, fanfaronading,
   gasconading, insolent, narcissan, narcissine, narcissistic,
   narcistic, overproud, overweening, self-admiring, self-advertising,
   self-applauding, self-approving, self-assuming, self-complacent,
   self-conceited, self-congratulating, self-congratulatory,
   self-content, self-contented, self-delighting, self-endeared,
   self-esteeming, self-flattering, self-glorious, self-gratulating,
   self-gratulatory, self-important, self-lauding, self-loving,
   self-respecting, self-satisfied, self-sufficient, self-vaunting,
   smug, stuck-up, supercilious, thrasonic, thrasonical, vain,
   vaporing, vaunting