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.
--------
Question: upraise, crane, excavator, digger, hoist

Answer: hoist


Question: jog, flap, fly, bee, bus

Answer: bee


Question: let go, water, empower, fire, retire

Answer:
water