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: firm, shareholders, common, alignment, taut

A: taut
****
Q: current, dastards, prompt, course, timely

A: course
****
Q: pay, instruct, heat, fire, scold

A:
heat
****