Answer: homophone

AnswerCrossword Clue
HOMOPHONEPunster's instrument
HOMOPHONECache for cash, say
homophonea word that sounds the same as another but is spelt differently eg 'to', 'too' and 'two'
homophoneEach of two or more words having the same pronunciation but different meanings, origins, or spelling, e.g., new and knew
homophoneEach of a set of symbols denoting the same sound or group of sounds