The Collaborative International Dictionary of English v.0.48:

Hearty \Heart"y\ (h[aum]rt"[y^]), a. [Compar. Heartier
   (h[aum]rt"[i^]*[~e]r); superl. Heartiest.]
   1. Pertaining to, or proceeding from, the heart; warm;
      cordial; bold; zealous; sincere; willing; also, energetic;
      active; eager; as, a hearty welcome; hearty in supporting
      the government.
      [1913 Webster]

            Full of hearty tears
            For our good father's loss.           --Marston.
      [1913 Webster]

   2. Exhibiting strength; sound; healthy; firm; not weak; as, a
      hearty man; hearty timber.
      [1913 Webster]

   3. Promoting strength; nourishing; rich; abundant; as, hearty
      food; a hearty meal.

   Syn: Sincere; real; unfeigned; undissembled; cordial;
        earnest; warm; zealous; ardent; eager; active; vigorous.

   Usage: Hearty, Cordial, Sincere. Hearty implies honesty
          and simplicity of feelings and manners; cordial refers
          to the warmth and liveliness with which the feelings
          are expressed; sincere implies that this expression
          corresponds to the real sentiments of the heart. A man
          should be hearty in his attachment to his friends,
          cordial in his reception of them to his house, and
          sincere in his offers to assist them.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hearty \Heart"y\, n.; pl. Hearties (h[aum]rt"[i^]z).
   Comrade; boon companion; good fellow; -- a term of familiar
   address and fellowship among sailors. --Dickens.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hearty
    adj 1: showing warm and heartfelt friendliness; "gave us a
           cordial reception"; "a hearty welcome"
    2: providing abundant nourishment; "a hearty meal"; "good solid
       food"; "ate a substantial breakfast"; "four square meals a
       day" [syn: hearty, satisfying, solid, square,
       substantial]
    3: endowed with or exhibiting great bodily or mental health; "a
       hearty glow of health" [syn: hearty, full-blooded,
       lusty, red-blooded]
    4: consuming abundantly and with gusto; "a hearty (or healthy)
       appetite"
    5: without reservation; "hearty support"

Moby Thesaurus II by Grady Ward, 1.0:

234 Moby Thesaurus words for "hearty":
   AB, Ancient Mariner, Argonaut, Dylan, Flying Dutchman, Neptune, OD,
   Poseidon, Varuna, abandoned, ablaze, able seaman,
   able-bodied seaman, abundant, active, acute, affable, affectionate,
   afire, aggressive, amiable, amicable, ample, animated, antic,
   ardent, authentic, beefy, bluejacket, boiling over, bon vivant,
   boon, boon companion, bouncing, breathless, brisk, buccaneer,
   burning, capersome, coltish, committed, convivial, cordial,
   dedicated, deep, deep-sea man, delirious, devoted, devout, doughty,
   drunk, dynamic, eager, earnest, energetic, enterprising,
   enthusiastic, excited, exuberant, fair-weather sailor, faithful,
   febrile, fervent, fervid, festive, fevered, feverish, fiery,
   fisherman, flaming, flush, flushed, forceful, forcible, forcy,
   free and easy, friendly, frisky, frolicsome, full of beans,
   full of pep, full-blooded, full-strength, gamesome, gay, generous,
   genial, genuine, glowing, go-go, good fellow, gracious, gutsy,
   gutty, hail-fellow-well-met, hale, hale and hearty, hard,
   hard as nails, hardy, healthy, heartfelt, heated, hefty, honest,
   hospitable, hot, hot-blooded, husky, impassioned, impetuous,
   in earnest, incisive, intense, intent, intent on, intoxicated,
   invigorating, iron-hard, jack, jack afloat, jack-tar, jacky, jolly,
   jolly fellow, jovial, keen, kinetic, liberal, limey, lively,
   living, lobsterman, loyal, lusty, mariner, matelot, mettlesome,
   mighty, navigator, neighborly, nervy, nourishing, obstinate,
   on fire, open, openhearted, passionate, peppy, perfervid, pirate,
   playful, pot companion, potent, powerful, privateer, profound,
   profuse, puissant, receptive, red-blooded, red-hot, resolute,
   responsive, robust, robustious, robustuous, rollicking,
   rollicksome, rompish, rude, rugged, sailor, salt, satisfying,
   sea dog, sea rover, seafarer, seafaring man, seaman, serious,
   shipman, sincere, sizeable, skittish, smacking, snappy, solid,
   sound, spanking, spirited, sportive, sprightly, square, stalwart,
   steaming, steamy, steely, stout, strapping, strengthening,
   strenuous, strong, strong as brandy, strong as strong,
   strong-willed, sturdy, substantial, take-charge, take-over, tar,
   trenchant, unfeigned, unrestrained, vehement, vibrant, vigorous,
   viking, vital, vivacious, vivid, warm, warmhearted, water dog,
   welcoming, whaler, white-hot, wholehearted, windjammer, windsailor,
   zealous, zestful, zesty, zippy