The words below share an interesting property. Can you determine what it is?

HIRED
FAILED
BRAIN
TOASTED
WANING
HOMELY

HINT:
Replacing a single letter in each word with a new one will change each word in the same way.

Answer:

Each word can be changed into a word of opposite meaning by changing one letter:

HIRED - FIRED
FAILED - NAILED
BRAIN - BRAWN
TOASTED - ROASTED
WANING - WAXING
HOMELY - COMELY

Credit: Will Shortz
NPR Weekend Edition Sunday Puzzle
June 10, 2012
THIS CHANGES EVERYTHING