The Collaborative International Dictionary of English v.0.48:

Forte \Forte\ (f[=o]rt), n. [IT. forte: cf. F. fort. See
   Fort.]
   1. The strong point; that in which one excels.
      [1913 Webster]

            The construction of a fable seems by no means the
            forte of our modern poetical writers. --Jeffrey.
      [1913 Webster]

   2. The stronger part of the blade of a sword; the part of
      half nearest the hilt; -- opposed to foible.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forte \For"te\ (f[^o]r"t[asl] or f[=o]r"t[asl]), adv. [It.
   forte, a. & adv., fr. L. fortis strong.] (Mus.)
   Loudly; strongly; powerfully.
   [1913 Webster]

WordNet (r) 3.0 (2006):

forte
    adv 1: used as a direction in music; to be played relatively
           loudly [syn: forte, loudly] [ant: piano, softly]
    adj 1: used chiefly as a direction or description in music; "the
           forte passages in the composition" [syn: forte, loud]
           [ant: piano, soft]
    n 1: an asset of special worth or utility; "cooking is his
         forte" [syn: forte, strong suit, long suit, metier,
         specialty, speciality, strong point, strength]
         [ant: weak point]
    2: (music) loud [syn: forte, fortissimo]
    3: the stronger part of a sword blade between the hilt and the
       foible

Moby Thesaurus II by Grady Ward, 1.0:

146 Moby Thesaurus words for "forte":
   a cappella, abbandono, ability, ableness, accrescendo, adagietto,
   adagio, affettuoso, agilmente, agitato, allegretto, allegro, aloud,
   amabile, amoroso, andante, andantino, appassionatamente,
   appassionato, aptitude, area, bag, booming, brillante, bump,
   caliber, capability, capacity, capriccioso, competence,
   con affetto, con agilita, con agitazione, con amore, crescendo,
   cup of tea, deafening, decrescendo, diminuendo, dolce, dower,
   dowry, ear-piercing, ear-rending, ear-splitting, earthshaking,
   effectiveness, efficiency, endowment, equipment, faculty, field,
   flair, fortemente, fortissimo, full, genius, gift, in full cry,
   instinct, lamentabile, larghetto, larghissimo, largo, legato,
   leggiero, line, long suit, loud, loud-sounding, loudish, loudly,
   lustily, main interest, makings, manner, marcando, medium, metier,
   morendo, natural endowment, natural gift, noisily, oyster,
   parlando, parts, pealing, pet subject, pianissimo, piano, piercing,
   pizzicato, plangent, potential, power, powers, prestissimo, presto,
   pursuit, qualification, rallentando, resounding, resoundingly,
   ringing, ringingly, ritardando, ritenuto, scherzando, scherzo,
   scherzoso, sonorous, sordo, sotto voce, specialism, speciality,
   specialization, specialty, spiccato, staccato, stentoraphonic,
   stentorian, stentorious, strength, stretto, strong flair,
   strong point, style, talent, talents, technicality, the goods,
   the stuff, thing, thunderous, tonitruant, tonitruous, tremolando,
   tremoloso, trillando, type, uproariously, vocation, way, weakness,
   what it takes, window-rattling