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

RUPEE
RIVAL
WADDLE
BERATE
RAMBLE
TERRACE
BOLSTER
ROWDY

HINT:
It has to do with the first three letters in each word.

Answer:

The first three letters in each word can be reversed to form a new word:

RUPEE - PUREE
RIVAL - VIRAL
WADDLE - DAWDLE
BERATE - REBATE
RAMBLE - MARBLE
TERRACE - RETRACE
BOLSTER - LOBSTER
ROWDY - WORDY

Credit: Will Shortz
NPR Weekend Edition Sunday Puzzle
Feb. 16, 2014