Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

[EX Q]: truss rod, pick, chord, worried, fret
[EX A]: worried

[EX Q]: comfortable, ok, decent, fine, suspension
[EX A]: suspension

[EX Q]: cold, icy, chill, cool, ethical
[EX A]:
ethical