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: corner, deck, fight, knockout, blind

A: blind
****
Q: deck, dock, galley, joker, hull

A: joker
****
Q: regular, general, captain, ubiquitous, popular

A:
captain
****