Source : Webster's Revised Unabridged Dictionary (1913)

Suitable \Suit"a*ble\, a.
   Capable of suiting; fitting; accordant; proper; becoming;
   agreeable; adapted; as, ornaments suitable to one's station;
   language suitable for the subject. -- {Suit"a*ble*ness}, n.
   -- {Suit"a*bly}, adv.

   Syn: Proper; fitting; becoming; accordant; agreeable;
        competent; correspondent; compatible; consonant;
        congruous; consistent.

Source : WordNet®

suitableness
     n : the quality of having the properties that are right for a
         specific purpose; "an important requirement is
         suitability for long trips" [syn: {suitability}] [ant: {unsuitability},
          {unsuitability}]