Source : Webster's Revised Unabridged Dictionary (1913)

Homophone \Hom"o*phone\, n. [Cf. F. homophone. See
   {Homophonous}.]
   1. A letter or character which expresses a like sound with
      another. --Gliddon.

   2. A word having the same sound as another, but differing
      from it in meaning and usually in spelling; as, all and
      awl; bare and bear; rite, write, right, and wright.

Source : WordNet®

homophone
     n : two words are homophones if they are pronounced the same way
         but differ in meaning or spelling or both (e.g. bare and
         bear)