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: deal, 70, equitable, fair, raining

A: equitable
****
Q: hoist, neck, concrete pourer, hummingbird, crane

A: concrete pourer
****
Q: solid, streamline, rough, firm, taut

A:
streamline
****