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.

[Q]: nervous, bored, emotional supports, chord, fret
[A]: chord


[Q]: gunwale, stern, deck, box, bow
[A]: box


[Q]: optimist, scorching, chill, cool, tropical
[A]:
optimist