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]: lifeline, knockout, deck, punch, tko
[A]: lifeline


[Q]: size, equitable, fair, alright, fine
[A]: size


[Q]: deck, lifeline, tko, gunwale, rudder
[A]:
tko