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]: dump truck, tackle, crane, duck, mallet
[A]: dump truck


[Q]: sugars, fat, protein, skinny, iron
[A]: skinny


[Q]: fortitude, stern, frank, matter of fact, vittles
[A]:
vittles