The following words share an unusual property. Can you determine what it is?

LIES
BULL
DIME
FRAYS
SIGHTS
SHOOTS

HINT:
The answer involves a change in spelling for each clue word.

Answers:

After a change in spelling, each word can be preceded by PARA to form a new, unrelated word:

PARALYZE
PARABLE
PARADIGM
PARAPHRASE
PARASITES
PARACHUTES 

Credit: GAMES Magazine - Oct. 5, 2005
K. M. Paskert
"DOUBLE MEANT" TWINS  (adapted)