What do the following words have in common, other than beginning with S?

SEEK
SIGN
SEALED
SOUL
SINGLE
SUIT

HINT:
Think phonetically.

Answer:

If you pronounce each S as SH, ignoring spelling, you hear different words:

SEEK - SHEIK
SIGN - SHINE
SEALED - SHIELD
SOUL - SHOAL
SINGLE - SHINGLE
SUIT - SHOOT 

Credit: Will Shortz
NPR Weekend Edition Sunday Puzzle
July 16, 2006 - SAME SHAME GAME