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]: wave, spider, fly, flap, car
[A]: spider


[Q]: concerned, strap lock, anxious, bored, fret
[A]: strap lock


[Q]: fritter, croquet, dessert, seperate, doughnut
[A]:
seperate