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]: squashed, cabin, flat, smooth, round
[EX A]: smooth

[EX Q]: tangle, fair, impartial, dishonest, balanced
[EX A]: tangle

[EX Q]: glass, plastic, vinyl, fiberglass, fork
[EX A]:
fork