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: mallet, goose, geese, hike, duck

A: hike
****
Q: bow, gunwale, crew, deck, blocking

A: blocking
****
Q: canyoning, hunting, bat, row, fish

A:
bat
****