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: gunwale, stern, deck, box, bow

A: box
****
Q: signal, sea, current, drink, belated

A: belated
****
Q: wave, spider, fly, flap, car

A:
spider
****