NINE LETTERS - THREE SYNONYMS
Credit: Merl Reagle
Presented by Will Shortz
NPR Weekend Edition Sunday - June 2, 2013

Can you think of three, three-letter words which are synonyms of each other, made up from nine different letters of the alphabet, each letter used once and only once?

HINT:
In alphabetical order, these are the nine letters:

B, E, G, I, K, R, U, V, X

Answer:

BUG
IRK
VEX 

Alternative answer:

CUT
HEW
NIP 

Credit: Blaine's Puzzle Blog