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: close, nearest, touching, on top of, barred

A: barred
****
Q: rudder, bow, pack, crew, deck

A: pack
****
Q: centimeter, finger, arm, head, foot

A:
centimeter
****