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, kind, opposite of up, lower, ground

A: kind
****
Q: glass, wood, coating, knifer, woodwork

A: knifer
****
Q: fish, cow, tiger, stingray, canyoning

A:
canyoning
****