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]: sustainability, firm, amalgamated, combined, rigged
[EX A]: rigged

[EX Q]: blue, wave, current, timely, drink
[EX A]: timely

[EX Q]: canyoning, fish, iguana, hunting, swim
[EX A]:
iguana