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: answer calls, image, organize, file, correspondence

A: image
****
Q: well, fine, neat, beautiful, level

A:
well
****