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]: glass, wood, coating, knifer, woodwork
[A]: knifer


[Q]: ecstatic, content, disappointed, sad, service
[A]: service


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