The Collaborative International Dictionary of English v.0.48:

Perfervid \Per*fer"vid\, a. [Pref. per- + fervid.]
   Very fervid; too fervid; glowing; ardent.
   [1913 Webster]

WordNet (r) 3.0 (2006):

perfervid
    adj 1: characterized by intense emotion; "ardent love"; "an
           ardent lover"; "a fervent desire to change society"; "a
           fervent admirer"; "fiery oratory"; "an impassioned
           appeal"; "a torrid love affair" [syn: ardent,
           fervent, fervid, fiery, impassioned, perfervid,
           torrid]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "perfervid":
   abandoned, afire, ardent, at fever pitch, bigoted, blazing,
   burning, committed, dedicated, delirious, devoted, devout, earnest,
   enhanced, extravagant, extreme, extremist, faithful, fanatic,
   fanatical, febrile, fervent, fervid, feverish, fiery, flaming,
   frantic, frenetic, frenzied, furious, glowing, haggard, hearty,
   heated, hectic, heightened, hot, hot-blooded, hysteric,
   impassioned, in earnest, infatuated, inordinate, insane, intense,
   intensified, intent, intent on, irrational, loyal, on fire,
   overanxious, overdesirous, overeager, overenthusiastic,
   overreligious, overzealous, passionate, rabid, red-hot, resolute,
   serious, sincere, spirited, ultrazealous, unreasonable, vehement,
   warm, white-hot, wild, wild-eyed, wild-looking, zealotic,
   zealous