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: down, lower, opposite of up, ground, remorseful

A: remorseful
****
Q: ring, deck, pack, box, level

A: pack
****
Q: pounce, fly, swim, walk, walk

A:
walk
****