Odd Man Out

Is the title of today's handy dandy discount MENSA calendar Brain Bender. Ready to play?

--------------------

Which of the scrambled words below is least like the others? (The difference has nothing to do with vowels, consonants or syllables.)

RTOCAR
TRAKEHCOI
QUAHSS
YRELEC
REGMAHRUB

--------------------

Is it just me, or do all of those sound like words a Klingon would know?? Huh. Anyway, like always the answers will be found later in the comments. See you then!