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: fearful, content, substance, program, thing

A: fearful
****
Q: hiking, stingray, shark, fish, tiger

A: hiking
****
Q: variety, clime, medium, fair, milky

A:
clime
****