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: clothing, content, service, substance, ecstatic

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

A: course
****
Q: fair, decent, milky, texture, color

A:
decent
****