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]: fret, worried, chord, notes, headstock
[A]: worried


[Q]: lead, glass, spoon, fiberglass, spyhole
[A]: spoon


[Q]: club, burger, dance hall, cinema, bar
[A]:
burger