Source : Webster's Revised Unabridged Dictionary (1913)

Suitability \Suit`a*bil"i*ty\, n.
   The quality or state of being suitable; suitableness.

Source : WordNet®

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