The Collaborative International Dictionary of English v.0.48:

Passionate \Pas"sion*ate\, a. [LL. passionatus: cf. F.
   passionn['e].]
   1. Capable or susceptible of passion, or of different
      passions; easily moved, excited or agitated; specifically,
      easily moved to anger; irascible; quick-tempered; as, a
      passionate nature.
      [1913 Webster]

            Homer's Achilles is haughty and passionate. --Prior.
      [1913 Webster]

   2. Characterized by passion; expressing passion; ardent in
      feeling or desire; vehement; warm; as, a passionate
      friendship. "The passionate Pilgrim." --Shak.
      [1913 Webster]

   3. Suffering; sorrowful. [Obs.] --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Passionate \Pas"sion*ate\, v. i.
   1. To affect with passion; to impassion. [Obs.]
      [1913 Webster]

            Great pleasure, mixed with pitiful regard,
            The godly king and queen did passionate. --Spenser.
      [1913 Webster]

   2. To express feelingly or sorrowfully. [Obs.] --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

passionate
    adj 1: having or expressing strong emotions [ant: passionless]

Moby Thesaurus II by Grady Ward, 1.0:

173 Moby Thesaurus words for "passionate":
   abandoned, ablaze, afire, amative, amatory, amorous, animated,
   ardent, argumentative, aroused, atrabiliar, atrabilious, attracted,
   avid, belligerent, bilious, blazing, boiling, boiling over,
   breathless, burning, burning with excitement, cathectic, choleric,
   combustible, committed, concerned, concupiscent, contentious,
   cordial, cranky, cross, curious, dedicated, delirious, desirous,
   devoted, devout, drunk, eager, earnest, ejaculatory, emotional,
   emphatic, energetic, enthusiastic, erotic, excited, exciting,
   explosive, exuberant, faithful, fanatic, fanatical, fascinated,
   febrile, fervent, fervid, fevered, feverish, fierce, fiery,
   flaming, flushed, furious, glowing, goatish, hard-core, hasty,
   headlong, hearty, heated, hectic, het up, high-powered, horny, hot,
   hot-blooded, hot-tempered, hotheaded, huffish, huffy, impassioned,
   impetuous, in earnest, in rut, inflamed, intense, intent,
   intent on, interested, intoxicated, invigorated, irascible,
   irritable, itching, keen, keen on, lascivious, lecherous,
   libidinous, lickerish, lively, loverlike, loverly, loyal, lustful,
   madcap, on fire, orgasmic, orgastic, peevish, peppery, perfervid,
   piqued, precipitate, provoking, prurient, pugnacious, quarrelsome,
   quick, quick-tempered, randy, ratty, red-hot, resolute, salacious,
   satyric, scorching, seething, sensual, serious, sex-starved,
   sexual, sexually excited, sexy, short-tempered, simmering, sincere,
   snappish, spirited, spunky, steaming, steamy, stimulated,
   stimulating, stirring, stormy, sultry, tantalized, temperamental,
   tempestuous, testy, tetchy, tickled, titillated, tornadic,
   totally committed, touchy, turned-on, unrestrained, unsatisfied,
   urgent, vehement, vigorous, violent, volatile, volcanic, warm,
   white-hot, wild, zealous, zestful