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]: bus, fly, swim, spider, flap
[A]: spider


[Q]: fair, raining, equitable, impartial, unjust
[A]: raining


[Q]: area, sugar, sugars, fat, iron
[A]:
area