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]: invent, unlicensed, brownies, lie, fudge
[A]: brownies


[Q]: fair, tangle, level, deal, make the grade
[A]:
level