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


[Q]: fearful, food, content, nervous, excited
[A]: food


[Q]: dastards, current, whirlpool, timely, up to the moment
[A]:
whirlpool